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https://dsaanimator.com/patterns/tree-paths 2026-11-02 weekly 0.8 https://dsaanimator.com/patterns/two-pointers-opposite 2026-11-02 weekly 0.8 https://dsaanimator.com/patterns/two-pointers-same 2026-11-02 weekly 0.8 https://dsaanimator.com/patterns/two-pointers-threesum 2026-11-02 weekly 0.8 https://dsaanimator.com/dsa-revision/1929-concatenation-of-array 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/1929-concatenation-of-array.jpg Concatenation of Array (LeetCode 1929) — Video Explanation Animated Arrays revision video: Concatenation of Array (LeetCode 1929, Easy) solved with the Basics pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/01-arrays/1929-concatenation-of-array.mp4 70 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/1480-running-sum 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/1480-running-sum.jpg Running Sum of 1D Array (LeetCode 1480) — Video Explanation Animated Arrays 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pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/01-arrays/2239-find-closest-number.mp4 75 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/88-merge-sorted-array 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/88-merge-sorted-array.jpg Merge Sorted Array (LeetCode 88) — Video Explanation Animated Arrays revision video: Merge Sorted Array (LeetCode 88, Easy) solved with the Two Pointers pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/01-arrays/88-merge-sorted-array.mp4 103 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/26-remove-duplicates 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/26-remove-duplicates.jpg Remove Duplicates from Sorted Array (LeetCode 26) — Video Explanation Animated Arrays revision video: Remove Duplicates from Sorted Array (LeetCode 26, Easy) solved with the Two Pointers pattern — problem, brute force, 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https://videos.dsaanimator.com/01-arrays/15-three-sum.mp4 107 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/42-trapping-rain-water 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/42-trapping-rain-water.jpg Trapping Rain Water (LeetCode 42) — Video Explanation Animated Arrays revision video: Trapping Rain Water (LeetCode 42, Hard) solved with the Two Pointers pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/01-arrays/42-trapping-rain-water.mp4 84 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/167-two-sum-ii 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/167-two-sum-ii.jpg Two Sum II (LeetCode 167) — Video Explanation Animated Arrays revision video: Two Sum II (LeetCode 167, Medium) solved with the Two Pointers pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/01-arrays/167-two-sum-ii.mp4 116 2026-11-01T09:00:00+05:30 yes 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https://dsaanimator.com/dsa-revision/53-maximum-subarray 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/53-maximum-subarray.jpg Maximum Subarray (LeetCode 53) — Video Explanation Animated Arrays revision video: Maximum Subarray (LeetCode 53, Medium) solved with the Kadane's Algorithm pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/01-arrays/53-maximum-subarray.mp4 76 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/121-best-time-buy-sell-stock 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/121-best-time-buy-sell-stock.jpg Best Time to Buy and Sell Stock (LeetCode 121) — Video Explanation Animated Arrays revision video: Best Time to Buy and Sell Stock (LeetCode 121, Easy) solved with the One Pass pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/01-arrays/121-best-time-buy-sell-stock.mp4 80 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/643-max-average-subarray 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/643-max-average-subarray.jpg Maximum Average Subarray I (LeetCode 643) — Video Explanation Animated Arrays revision video: Maximum Average Subarray I (LeetCode 643, Easy) solved with the Fixed Sliding Window pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/01-arrays/643-max-average-subarray.mp4 91 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/1004-max-consecutive-ones-iii 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/1004-max-consecutive-ones-iii.jpg Max Consecutive Ones III (LeetCode 1004) — Video Explanation Animated Arrays revision video: Max Consecutive Ones III (LeetCode 1004, Medium) solved with the Sliding Window pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/01-arrays/1004-max-consecutive-ones-iii.mp4 102 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/209-min-size-subarray-sum 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/209-min-size-subarray-sum.jpg Minimum Size Subarray Sum (LeetCode 209) — Video Explanation Animated Arrays revision video: Minimum Size Subarray Sum (LeetCode 209, Medium) solved with the Sliding Window pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/01-arrays/209-min-size-subarray-sum.mp4 99 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/1-two-sum 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/1-two-sum.jpg Two Sum (LeetCode 1) — Video Explanation Animated Arrays revision video: Two Sum (LeetCode 1, Easy) solved with the Hash Map pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/01-arrays/1-two-sum.mp4 72 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/217-contains-duplicate 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/217-contains-duplicate.jpg Contains Duplicate (LeetCode 217) — Video Explanation Animated Arrays revision video: Contains Duplicate (LeetCode 217, Easy) solved with the Hash Set pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/01-arrays/217-contains-duplicate.mp4 55 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/41-first-missing-positive 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/41-first-missing-positive.jpg First Missing Positive (LeetCode 41) — Video Explanation Animated Arrays revision video: First Missing Positive (LeetCode 41, Hard) solved with the Cyclic Placement pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/01-arrays/41-first-missing-positive.mp4 97 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/238-product-except-self 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/238-product-except-self.jpg Product of Array Except Self (LeetCode 238) — Video Explanation Animated Arrays revision video: Product of Array Except Self (LeetCode 238, Medium) solved with the Prefix & Suffix pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/01-arrays/238-product-except-self.mp4 97 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/383-ransom-note 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/383-ransom-note.jpg Ransom Note (LeetCode 383) — Video Explanation Animated Arrays revision video: Ransom Note (LeetCode 383, Easy) solved with the Frequency Count pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/01-arrays/383-ransom-note.mp4 70 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/560-subarray-sum-equals-k 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/560-subarray-sum-equals-k.jpg Subarray Sum Equals K (LeetCode 560) — Video Explanation Animated Arrays revision video: Subarray Sum Equals K (LeetCode 560, Medium) solved with the Prefix Sum + Hash Map pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/01-arrays/560-subarray-sum-equals-k.mp4 78 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/169-majority-element 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/169-majority-element.jpg Majority Element (LeetCode 169) — Video Explanation Animated Arrays revision video: Majority Element (LeetCode 169, Easy) solved with the Boyer-Moore Voting pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/01-arrays/169-majority-element.mp4 75 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/128-longest-consecutive-sequence 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/128-longest-consecutive-sequence.jpg Longest Consecutive Sequence (LeetCode 128) — Video Explanation Animated Arrays revision video: Longest Consecutive Sequence (LeetCode 128, Medium) solved with the Hash Set pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/01-arrays/128-longest-consecutive-sequence.mp4 83 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/189-rotate-array 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/189-rotate-array.jpg Rotate Array (LeetCode 189) — Video Explanation Animated Arrays revision video: Rotate Array (LeetCode 189, Medium) solved with the Reversal pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/01-arrays/189-rotate-array.mp4 84 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/75-sort-colors 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/75-sort-colors.jpg Sort Colors (LeetCode 75) — Video Explanation Animated Arrays revision video: Sort Colors (LeetCode 75, Medium) solved with the Dutch National Flag pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/01-arrays/75-sort-colors.mp4 87 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/13-roman-to-integer 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/13-roman-to-integer.jpg Roman to Integer (LeetCode 13) — Video Explanation Animated Strings revision video: Roman to Integer (LeetCode 13, Easy) solved with the Lookahead pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/02-strings/13-roman-to-integer.mp4 87 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/14-longest-common-prefix 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/14-longest-common-prefix.jpg Longest Common Prefix (LeetCode 14) — Video Explanation Animated Strings revision video: Longest Common Prefix (LeetCode 14, Easy) solved with the Vertical Scan pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/02-strings/14-longest-common-prefix.mp4 80 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/271-encode-decode-strings 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/271-encode-decode-strings.jpg Encode and Decode Strings (LeetCode 271) — Video Explanation Animated Strings revision video: Encode and Decode Strings (LeetCode 271, Medium) solved with the Length Prefix pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/02-strings/271-encode-decode-strings.mp4 92 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/205-isomorphic-strings 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/205-isomorphic-strings.jpg Isomorphic Strings (LeetCode 205) — Video Explanation Animated Strings revision video: Isomorphic Strings (LeetCode 205, Easy) solved with the Two Hash Maps pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/02-strings/205-isomorphic-strings.mp4 84 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/344-reverse-string 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/344-reverse-string.jpg Reverse String (LeetCode 344) — Video Explanation Animated Strings revision video: Reverse String (LeetCode 344, Easy) solved with the Two Pointers pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/02-strings/344-reverse-string.mp4 58 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/3-longest-substring-without-repeating 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/3-longest-substring-without-repeating.jpg Longest Substring Without Repeating Characters (LeetCode 3) — Video Explanation Animated Strings revision video: Longest Substring Without Repeating Characters (LeetCode 3, Medium) solved with the Sliding Window pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/02-strings/3-longest-substring-without-repeating.mp4 111 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/424-longest-repeating-char-replacement 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/424-longest-repeating-char-replacement.jpg Longest Repeating Character Replacement (LeetCode 424) — Video Explanation Animated Strings revision video: Longest Repeating Character Replacement (LeetCode 424, Medium) solved with the Sliding Window pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/02-strings/424-longest-repeating-char-replacement.mp4 101 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/76-minimum-window-substring 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/76-minimum-window-substring.jpg Minimum Window Substring (LeetCode 76) — Video Explanation Animated Strings revision video: Minimum Window Substring (LeetCode 76, Hard) solved with the Sliding Window pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/02-strings/76-minimum-window-substring.mp4 108 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/567-permutation-in-string 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/567-permutation-in-string.jpg Permutation in String (LeetCode 567) — Video Explanation Animated Strings revision video: Permutation in String (LeetCode 567, Medium) solved with the Fixed Sliding Window pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/02-strings/567-permutation-in-string.mp4 79 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/438-find-all-anagrams 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/438-find-all-anagrams.jpg Find All Anagrams in a String (LeetCode 438) — Video Explanation Animated Strings revision video: Find All Anagrams in a String (LeetCode 438, Medium) solved with the Fixed Sliding Window pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/02-strings/438-find-all-anagrams.mp4 100 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/242-valid-anagram 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/242-valid-anagram.jpg Valid Anagram (LeetCode 242) — Video Explanation Animated Strings revision video: Valid Anagram (LeetCode 242, Easy) solved with the Frequency Count pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/02-strings/242-valid-anagram.mp4 99 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/49-group-anagrams 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/49-group-anagrams.jpg Group Anagrams (LeetCode 49) — Video Explanation Animated Strings revision video: Group Anagrams (LeetCode 49, Medium) solved with the Hash Map pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/02-strings/49-group-anagrams.mp4 81 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/1189-maximum-number-of-balloons 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/1189-maximum-number-of-balloons.jpg Maximum Number of Balloons (LeetCode 1189) — Video Explanation Animated Strings revision video: Maximum Number of Balloons (LeetCode 1189, Easy) solved with the Frequency Count pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/02-strings/1189-maximum-number-of-balloons.mp4 66 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/125-valid-palindrome 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/125-valid-palindrome.jpg Valid Palindrome (LeetCode 125) — Video Explanation Animated Strings revision video: Valid Palindrome (LeetCode 125, Easy) solved with the Two Pointers pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/02-strings/125-valid-palindrome.mp4 82 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/680-valid-palindrome-ii 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/680-valid-palindrome-ii.jpg Valid Palindrome II (LeetCode 680) — Video Explanation Animated Strings revision video: Valid Palindrome II (LeetCode 680, Medium) solved with the Two Pointers pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/02-strings/680-valid-palindrome-ii.mp4 67 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/5-longest-palindromic-substring 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/5-longest-palindromic-substring.jpg Longest Palindromic Substring (LeetCode 5) — Video Explanation Animated Strings revision video: Longest Palindromic Substring (LeetCode 5, Medium) solved with the Expand Around Center pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/02-strings/5-longest-palindromic-substring.mp4 101 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/647-palindromic-substrings 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/647-palindromic-substrings.jpg Palindromic Substrings (LeetCode 647) — Video Explanation Animated Strings revision video: Palindromic Substrings (LeetCode 647, Medium) solved with the Expand Around Center pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/02-strings/647-palindromic-substrings.mp4 67 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/54-spiral-matrix 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/54-spiral-matrix.jpg Spiral Matrix (LeetCode 54) — Video Explanation Animated Matrix revision video: Spiral Matrix (LeetCode 54, Medium) solved with the Boundary Traversal pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/03-matrix/54-spiral-matrix.mp4 90 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/59-spiral-matrix-ii 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/59-spiral-matrix-ii.jpg Spiral Matrix II (LeetCode 59) — Video Explanation Animated Matrix revision video: Spiral Matrix II (LeetCode 59, Medium) solved with the Boundary Traversal pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/03-matrix/59-spiral-matrix-ii.mp4 71 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/200-number-of-islands 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/200-number-of-islands.jpg Number of Islands (LeetCode 200) — Video Explanation Animated Matrix revision video: Number of Islands (LeetCode 200, Medium) solved with the DFS Flood Fill pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/03-matrix/200-number-of-islands.mp4 90 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/73-set-matrix-zeroes 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/73-set-matrix-zeroes.jpg Set Matrix Zeroes (LeetCode 73) — Video Explanation Animated Matrix revision video: Set Matrix Zeroes (LeetCode 73, Medium) solved with the In-place Markers pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/03-matrix/73-set-matrix-zeroes.mp4 97 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/79-word-search 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/79-word-search.jpg Word Search (LeetCode 79) — Video Explanation Animated Matrix revision video: Word Search (LeetCode 79, Medium) solved with the Backtracking DFS pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/03-matrix/79-word-search.mp4 86 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/240-search-2d-matrix-ii 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/240-search-2d-matrix-ii.jpg Search a 2D Matrix II (LeetCode 240) — Video Explanation Animated Matrix revision video: Search a 2D Matrix II (LeetCode 240, Medium) solved with the Staircase Search pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/03-matrix/240-search-2d-matrix-ii.mp4 76 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/48-rotate-image 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/48-rotate-image.jpg Rotate Image (LeetCode 48) — Video Explanation Animated Matrix revision video: Rotate Image (LeetCode 48, Medium) solved with the Transpose + Reverse pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/03-matrix/48-rotate-image.mp4 78 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/74-search-2d-matrix 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/74-search-2d-matrix.jpg Search a 2D Matrix (LeetCode 74) — Video Explanation Animated Matrix revision video: Search a 2D Matrix (LeetCode 74, Medium) solved with the Binary Search pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/03-matrix/74-search-2d-matrix.mp4 85 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/36-valid-sudoku 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/36-valid-sudoku.jpg Valid Sudoku (LeetCode 36) — Video Explanation Animated Matrix revision video: Valid Sudoku (LeetCode 36, Medium) solved with the Hash Sets pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/03-matrix/36-valid-sudoku.mp4 102 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/20-valid-parentheses 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/20-valid-parentheses.jpg Valid Parentheses (LeetCode 20) — Video Explanation Animated Stack revision video: Valid Parentheses (LeetCode 20, Easy) solved with the Stack pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/04-stack/20-valid-parentheses.mp4 97 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/150-evaluate-rpn 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/150-evaluate-rpn.jpg Evaluate Reverse Polish Notation (LeetCode 150) — Video Explanation Animated Stack revision video: Evaluate Reverse Polish Notation (LeetCode 150, Medium) solved with the Stack pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/04-stack/150-evaluate-rpn.mp4 71 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/739-daily-temperatures 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/739-daily-temperatures.jpg Daily Temperatures (LeetCode 739) — Video Explanation Animated Stack revision video: Daily Temperatures (LeetCode 739, Medium) solved with the Monotonic Stack pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/04-stack/739-daily-temperatures.mp4 108 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/155-min-stack 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/155-min-stack.jpg Min Stack (LeetCode 155) — Video Explanation Animated Stack revision video: Min Stack (LeetCode 155, Medium) solved with the Stack Design pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/04-stack/155-min-stack.mp4 80 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/496-next-greater-element-i 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/496-next-greater-element-i.jpg Next Greater Element I (LeetCode 496) — Video Explanation Animated Stack revision video: Next Greater Element I (LeetCode 496, Easy) solved with the Monotonic Stack pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/04-stack/496-next-greater-element-i.mp4 83 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/84-largest-rectangle-histogram 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/84-largest-rectangle-histogram.jpg Largest Rectangle in Histogram (LeetCode 84) — Video Explanation Animated Stack revision video: Largest Rectangle in Histogram (LeetCode 84, Hard) solved with the Monotonic Stack pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/04-stack/84-largest-rectangle-histogram.mp4 100 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/85-maximal-rectangle 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/85-maximal-rectangle.jpg Maximal Rectangle (LeetCode 85) — Video Explanation Animated Stack revision video: Maximal Rectangle (LeetCode 85, Hard) solved with the Histogram per Row pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/04-stack/85-maximal-rectangle.mp4 85 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/224-basic-calculator 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/224-basic-calculator.jpg Basic Calculator (LeetCode 224) — Video Explanation Animated Stack revision video: Basic Calculator (LeetCode 224, Hard) solved with the Stack pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/04-stack/224-basic-calculator.mp4 91 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/gfg-reverse-first-k-elements-queue 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/gfg-reverse-first-k-elements-queue.jpg Reversing First K Elements of a Queue (GFG) — Video Explanation Animated Queue revision video: Reversing First K Elements of a Queue (GFG, Medium) solved with the Queue + Stack pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/05-queue/gfg-reverse-first-k-elements-queue.mp4 77 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/239-sliding-window-maximum 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/239-sliding-window-maximum.jpg Sliding Window Maximum (LeetCode 239) — Video Explanation Animated Queue revision video: Sliding Window Maximum (LeetCode 239, Hard) solved with the Monotonic Deque pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/05-queue/239-sliding-window-maximum.mp4 100 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/704-binary-search 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/704-binary-search.jpg Binary Search (LeetCode 704) — Video Explanation Animated Binary Search revision video: Binary Search (LeetCode 704, Easy) solved with the Binary Search pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/06-binary-search/704-binary-search.mp4 68 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/35-search-insert-position 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/35-search-insert-position.jpg Search Insert Position (LeetCode 35) — Video Explanation Animated Binary Search revision video: Search Insert Position (LeetCode 35, Easy) solved with the Binary Search pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/06-binary-search/35-search-insert-position.mp4 68 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/268-missing-number 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/268-missing-number.jpg Missing Number (LeetCode 268) — Video Explanation Animated Binary Search revision video: Missing Number (LeetCode 268, Easy) solved with the Math / XOR pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/06-binary-search/268-missing-number.mp4 73 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/34-first-last-position 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/34-first-last-position.jpg Find First and Last Position of Element (LeetCode 34) — Video Explanation Animated Binary Search revision video: Find First and Last Position of Element (LeetCode 34, Medium) solved with the Binary Search Bounds pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/06-binary-search/34-first-last-position.mp4 88 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/162-find-peak-element 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/162-find-peak-element.jpg Find Peak Element (LeetCode 162) — Video Explanation Animated Binary Search revision video: Find Peak Element (LeetCode 162, Medium) solved with the Binary Search on Slope pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/06-binary-search/162-find-peak-element.mp4 77 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/153-find-minimum-rotated 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/153-find-minimum-rotated.jpg Find Minimum in Rotated Sorted Array (LeetCode 153) — Video Explanation Animated Binary Search revision video: Find Minimum in Rotated Sorted Array (LeetCode 153, Medium) solved with the Binary Search pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/06-binary-search/153-find-minimum-rotated.mp4 72 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/33-search-rotated-sorted-array 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/33-search-rotated-sorted-array.jpg Search in Rotated Sorted Array (LeetCode 33) — Video Explanation Animated Binary Search revision video: Search in Rotated Sorted Array (LeetCode 33, Medium) solved with the Binary Search pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/06-binary-search/33-search-rotated-sorted-array.mp4 82 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/81-search-rotated-ii 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/81-search-rotated-ii.jpg Search in Rotated Sorted Array II (LeetCode 81) — Video Explanation Animated Binary Search revision video: Search in Rotated Sorted Array II (LeetCode 81, Medium) solved with the Binary Search pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/06-binary-search/81-search-rotated-ii.mp4 75 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/875-koko-eating-bananas 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/875-koko-eating-bananas.jpg Koko Eating Bananas (LeetCode 875) — Video Explanation Animated Binary Search revision video: Koko Eating Bananas (LeetCode 875, Medium) solved with the Binary Search on Answer pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/06-binary-search/875-koko-eating-bananas.mp4 80 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/1011-capacity-to-ship-packages 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/1011-capacity-to-ship-packages.jpg Capacity To Ship Packages Within D Days (LeetCode 1011) — Video Explanation Animated Binary Search revision video: Capacity To Ship Packages Within D Days (LeetCode 1011, Medium) solved with the Binary Search on Answer pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/06-binary-search/1011-capacity-to-ship-packages.mp4 73 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/410-split-array-largest-sum 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/410-split-array-largest-sum.jpg Split Array Largest Sum (LeetCode 410) — Video Explanation Animated Binary Search revision video: Split Array Largest Sum (LeetCode 410, Hard) solved with the Binary Search on Answer pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/06-binary-search/410-split-array-largest-sum.mp4 69 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/gfg-allocate-minimum-pages 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/gfg-allocate-minimum-pages.jpg Allocate Minimum Number of Pages (GFG) — Video Explanation Animated Binary Search revision video: Allocate Minimum Number of Pages (GFG, Hard) solved with the Binary Search on Answer pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/06-binary-search/gfg-allocate-minimum-pages.mp4 85 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/ib-painters-partition 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/ib-painters-partition.jpg The Painter's Partition Problem (InterviewBit) — Video Explanation Animated Binary Search revision video: The Painter's Partition Problem (InterviewBit, Hard) solved with the Binary Search on Answer pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/06-binary-search/ib-painters-partition.mp4 75 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/4-median-two-sorted-arrays 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/4-median-two-sorted-arrays.jpg Median of Two Sorted Arrays (LeetCode 4) — Video Explanation Animated Binary Search revision video: Median of Two Sorted Arrays (LeetCode 4, Hard) solved with the Binary Search on Partition pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/06-binary-search/4-median-two-sorted-arrays.mp4 96 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/83-remove-duplicates-sorted-list 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/83-remove-duplicates-sorted-list.jpg Remove Duplicates from Sorted List (LeetCode 83) — Video Explanation Animated Linked List revision video: Remove Duplicates from Sorted List (LeetCode 83, Easy) solved with the Linked List Traversal pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/07-linked-list/83-remove-duplicates-sorted-list.mp4 66 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/206-reverse-linked-list 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/206-reverse-linked-list.jpg Reverse Linked List (LeetCode 206) — Video Explanation Animated Linked List revision video: Reverse Linked List (LeetCode 206, Easy) solved with the Pointer Reversal pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/07-linked-list/206-reverse-linked-list.mp4 65 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/141-linked-list-cycle 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/141-linked-list-cycle.jpg Linked List Cycle (LeetCode 141) — Video Explanation Animated Linked List revision video: Linked List Cycle (LeetCode 141, Easy) solved with the Fast & Slow Pointers pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/07-linked-list/141-linked-list-cycle.mp4 71 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/876-middle-of-linked-list 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/876-middle-of-linked-list.jpg Middle of Linked List (LeetCode 876) — Video Explanation Animated Linked List revision video: Middle of Linked List (LeetCode 876, Easy) solved with the Fast & Slow Pointers pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/07-linked-list/876-middle-of-linked-list.mp4 59 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/19-remove-nth-from-end 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/19-remove-nth-from-end.jpg Remove Nth Node From End of List (LeetCode 19) — Video Explanation Animated Linked List revision video: Remove Nth Node From End of List (LeetCode 19, Medium) solved with the Two Pointers with Gap pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/07-linked-list/19-remove-nth-from-end.mp4 75 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/138-copy-list-with-random-pointer 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/138-copy-list-with-random-pointer.jpg Copy List with Random Pointer (LeetCode 138) — Video Explanation Animated Linked List revision video: Copy List with Random Pointer (LeetCode 138, Medium) solved with the Interleaving pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/07-linked-list/138-copy-list-with-random-pointer.mp4 90 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/2-add-two-numbers 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/2-add-two-numbers.jpg Add Two Numbers (LeetCode 2) — Video Explanation Animated Linked List revision video: Add Two Numbers (LeetCode 2, Medium) solved with the Linked List Arithmetic pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/07-linked-list/2-add-two-numbers.mp4 69 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/202-happy-number 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/202-happy-number.jpg Happy Number (LeetCode 202) — Video Explanation Animated Linked List revision video: Happy Number (LeetCode 202, Easy) solved with the Cycle Detection pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/07-linked-list/202-happy-number.mp4 72 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/92-reverse-linked-list-ii 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/92-reverse-linked-list-ii.jpg Reverse Linked List II (LeetCode 92) — Video Explanation Animated Linked List revision video: Reverse Linked List II (LeetCode 92, Medium) solved with the Pointer Reversal pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/07-linked-list/92-reverse-linked-list-ii.mp4 72 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/234-palindrome-linked-list 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/234-palindrome-linked-list.jpg Palindrome Linked List (LeetCode 234) — Video Explanation Animated Linked List revision video: Palindrome Linked List (LeetCode 234, Easy) solved with the Fast & Slow + Reverse pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/07-linked-list/234-palindrome-linked-list.mp4 63 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/143-reorder-list 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/143-reorder-list.jpg Reorder List (LeetCode 143) — Video Explanation Animated Linked List revision video: Reorder List (LeetCode 143, Medium) solved with the Fast & Slow + Reverse + Merge pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/07-linked-list/143-reorder-list.mp4 65 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/21-merge-two-sorted-lists 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/21-merge-two-sorted-lists.jpg Merge Two Sorted Lists (LeetCode 21) — Video Explanation Animated Linked List revision video: Merge Two Sorted Lists (LeetCode 21, Easy) solved with the Two Pointers Merge pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/07-linked-list/21-merge-two-sorted-lists.mp4 71 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/23-merge-k-sorted-lists 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/23-merge-k-sorted-lists.jpg Merge K Sorted Lists (LeetCode 23) — Video Explanation Animated Linked List revision video: Merge K Sorted Lists (LeetCode 23, Hard) solved with the Heap Merge pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/07-linked-list/23-merge-k-sorted-lists.mp4 70 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/25-reverse-nodes-in-k-group 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/25-reverse-nodes-in-k-group.jpg Reverse Nodes in K-Group (LeetCode 25) — Video Explanation Animated Linked List revision video: Reverse Nodes in K-Group (LeetCode 25, Hard) solved with the Pointer Reversal pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/07-linked-list/25-reverse-nodes-in-k-group.mp4 67 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/142-linked-list-cycle-ii 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/142-linked-list-cycle-ii.jpg Linked List Cycle II (LeetCode 142) — Video Explanation Animated Linked List revision video: Linked List Cycle II (LeetCode 142, Medium) solved with the Fast & Slow Pointers pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/07-linked-list/142-linked-list-cycle-ii.mp4 74 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/55-jump-game 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/55-jump-game.jpg Jump Game (LeetCode 55) — Video Explanation Animated Greedy revision video: Jump Game (LeetCode 55, Medium) solved with the Greedy Reach pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/08-greedy/55-jump-game.mp4 78 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/45-jump-game-ii 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/45-jump-game-ii.jpg Jump Game II (LeetCode 45) — Video Explanation Animated Greedy revision video: Jump Game II (LeetCode 45, Medium) solved with the Greedy BFS Levels pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/08-greedy/45-jump-game-ii.mp4 82 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/135-candy 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/135-candy.jpg Candy (LeetCode 135) — Video Explanation Animated Greedy revision video: Candy (LeetCode 135, Hard) solved with the Two-Pass Greedy pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/08-greedy/135-candy.mp4 85 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/134-gas-station 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/134-gas-station.jpg Gas Station (LeetCode 134) — Video Explanation Animated Greedy revision video: Gas Station (LeetCode 134, Medium) solved with the Greedy Reset pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/08-greedy/134-gas-station.mp4 85 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/gfg-minimum-platforms 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/gfg-minimum-platforms.jpg Minimum Platforms (GFG) — Video Explanation Animated Greedy revision video: Minimum Platforms (GFG, Medium) solved with the Sort + Sweep pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/08-greedy/gfg-minimum-platforms.mp4 86 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/763-partition-labels 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/763-partition-labels.jpg Partition Labels (LeetCode 763) — Video Explanation Animated Greedy revision video: Partition Labels (LeetCode 763, Medium) solved with the Greedy Last Occurrence pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/08-greedy/763-partition-labels.mp4 89 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/56-merge-intervals 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/56-merge-intervals.jpg Merge Intervals (LeetCode 56) — Video Explanation Animated Intervals revision video: Merge Intervals (LeetCode 56, Medium) solved with the Sort + Merge pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/09-intervals/56-merge-intervals.mp4 83 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/57-insert-interval 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/57-insert-interval.jpg Insert Interval (LeetCode 57) — Video Explanation Animated Intervals revision video: Insert Interval (LeetCode 57, Medium) solved with the Three-Phase Scan pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/09-intervals/57-insert-interval.mp4 84 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/253-meeting-rooms-ii 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/253-meeting-rooms-ii.jpg Meeting Rooms II (LeetCode 253) — Video Explanation Animated Intervals revision video: Meeting Rooms II (LeetCode 253, Medium) solved with the Min Heap of End Times pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/09-intervals/253-meeting-rooms-ii.mp4 70 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/435-non-overlapping-intervals 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/435-non-overlapping-intervals.jpg Non-Overlapping Intervals (LeetCode 435) — Video Explanation Animated Intervals revision video: Non-Overlapping Intervals (LeetCode 435, Medium) solved with the Greedy by End pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/09-intervals/435-non-overlapping-intervals.mp4 73 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/452-minimum-arrows-balloons 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/452-minimum-arrows-balloons.jpg Minimum Number of Arrows to Burst Balloons (LeetCode 452) — Video Explanation Animated Intervals revision video: Minimum Number of Arrows to Burst Balloons (LeetCode 452, Medium) solved with the Greedy by End pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/09-intervals/452-minimum-arrows-balloons.mp4 71 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/78-subsets 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/78-subsets.jpg Subsets (LeetCode 78) — Video Explanation Animated Backtracking revision video: Subsets (LeetCode 78, Medium) solved with the Backtracking pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/10-backtracking/78-subsets.mp4 79 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/90-subsets-ii 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/90-subsets-ii.jpg Subsets II (LeetCode 90) — Video Explanation Animated Backtracking revision video: Subsets II (LeetCode 90, Medium) solved with the Backtracking + Skip Duplicates pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/10-backtracking/90-subsets-ii.mp4 77 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/46-permutations 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/46-permutations.jpg Permutations (LeetCode 46) — Video Explanation Animated Backtracking revision video: Permutations (LeetCode 46, Medium) solved with the Backtracking with Used Set pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/10-backtracking/46-permutations.mp4 72 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/77-combinations 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/77-combinations.jpg Combinations (LeetCode 77) — Video Explanation Animated Backtracking revision video: Combinations (LeetCode 77, Medium) solved with the Backtracking + Pruning pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/10-backtracking/77-combinations.mp4 75 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/39-combination-sum 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/39-combination-sum.jpg Combination Sum (LeetCode 39) — Video Explanation Animated Backtracking revision video: Combination Sum (LeetCode 39, Medium) solved with the Backtracking + Reuse pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/10-backtracking/39-combination-sum.mp4 84 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/17-letter-combinations-phone 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/17-letter-combinations-phone.jpg Letter Combinations of a Phone Number (LeetCode 17) — Video Explanation Animated Backtracking revision video: Letter Combinations of a Phone Number (LeetCode 17, Medium) solved with the Backtracking on Digits pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/10-backtracking/17-letter-combinations-phone.mp4 70 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/22-generate-parentheses 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/22-generate-parentheses.jpg Generate Parentheses (LeetCode 22) — Video Explanation Animated Backtracking revision video: Generate Parentheses (LeetCode 22, Medium) solved with the Backtracking with Counts pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/10-backtracking/22-generate-parentheses.mp4 89 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/51-n-queens 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/51-n-queens.jpg N-Queens (LeetCode 51) — Video Explanation Animated Backtracking revision video: N-Queens (LeetCode 51, Hard) solved with the Backtracking on a Board pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/10-backtracking/51-n-queens.mp4 92 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/37-sudoku-solver 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/37-sudoku-solver.jpg Sudoku Solver (LeetCode 37) — Video Explanation Animated Backtracking revision video: Sudoku Solver (LeetCode 37, Hard) solved with the Backtracking on a Board pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/10-backtracking/37-sudoku-solver.mp4 87 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/102-binary-tree-level-order 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/102-binary-tree-level-order.jpg Binary Tree Level Order Traversal (LeetCode 102) — Video Explanation Animated Tree revision video: Binary Tree Level Order Traversal (LeetCode 102, Medium) solved with the BFS pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/11-tree/102-binary-tree-level-order.mp4 107 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/637-average-of-levels 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/637-average-of-levels.jpg Average of Levels in Binary Tree (LeetCode 637) — Video Explanation Animated Tree revision video: Average of Levels in Binary Tree (LeetCode 637, Easy) solved with the BFS Level Order pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/11-tree/637-average-of-levels.mp4 155 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/103-zigzag-level-order 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/103-zigzag-level-order.jpg Binary Tree Zigzag Level Order Traversal (LeetCode 103) — Video Explanation Animated Tree revision video: Binary Tree Zigzag Level Order Traversal (LeetCode 103, Medium) solved with the BFS Level Order pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/11-tree/103-zigzag-level-order.mp4 138 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/199-right-side-view 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/199-right-side-view.jpg Binary Tree Right Side View (LeetCode 199) — Video Explanation Animated Tree revision video: Binary Tree Right Side View (LeetCode 199, Medium) solved with the BFS Level Order pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/11-tree/199-right-side-view.mp4 110 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/101-symmetric-tree 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/101-symmetric-tree.jpg Symmetric Tree (LeetCode 101) — Video Explanation Animated Tree revision video: Symmetric Tree (LeetCode 101, Easy) solved with the Mirror Recursion pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/11-tree/101-symmetric-tree.mp4 118 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/543-diameter-of-binary-tree 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/543-diameter-of-binary-tree.jpg Diameter of Binary Tree (LeetCode 543) — Video Explanation Animated Tree revision video: Diameter of Binary Tree (LeetCode 543, Easy) solved with the DFS Height pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/11-tree/543-diameter-of-binary-tree.mp4 118 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/226-invert-binary-tree 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/226-invert-binary-tree.jpg Invert Binary Tree (LeetCode 226) — Video Explanation Animated Tree revision video: Invert Binary Tree (LeetCode 226, Easy) solved with the DFS Swap pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/11-tree/226-invert-binary-tree.mp4 110 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/104-maximum-depth 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/104-maximum-depth.jpg Maximum Depth of Binary Tree (LeetCode 104) — Video Explanation Animated Tree revision video: Maximum Depth of Binary Tree (LeetCode 104, Easy) solved with the DFS Height pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/11-tree/104-maximum-depth.mp4 96 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/110-balanced-binary-tree 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/110-balanced-binary-tree.jpg Balanced Binary Tree (LeetCode 110) — Video Explanation Animated Tree revision video: Balanced Binary Tree (LeetCode 110, Easy) solved with the DFS Height with Early Exit pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/11-tree/110-balanced-binary-tree.mp4 127 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/108-sorted-array-to-bst 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/108-sorted-array-to-bst.jpg Convert Sorted Array to Binary Search Tree (LeetCode 108) — Video Explanation Animated Tree revision video: Convert Sorted Array to Binary Search Tree (LeetCode 108, Easy) solved with the Divide and Conquer pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/11-tree/108-sorted-array-to-bst.mp4 126 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/114-flatten-to-linked-list 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/114-flatten-to-linked-list.jpg Flatten Binary Tree to Linked List (LeetCode 114) — Video Explanation Animated Tree revision video: Flatten Binary Tree to Linked List (LeetCode 114, Medium) solved with the Preorder Rewiring pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/11-tree/114-flatten-to-linked-list.mp4 146 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/98-validate-bst 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/98-validate-bst.jpg Validate Binary Search Tree (LeetCode 98) — Video Explanation Animated Tree revision video: Validate Binary Search Tree (LeetCode 98, Medium) solved with the DFS with Bounds pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/11-tree/98-validate-bst.mp4 137 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/236-lowest-common-ancestor 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/236-lowest-common-ancestor.jpg Lowest Common Ancestor of a Binary Tree (LeetCode 236) — Video Explanation Animated Tree revision video: Lowest Common Ancestor of a Binary Tree (LeetCode 236, Medium) solved with the Postorder DFS pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/11-tree/236-lowest-common-ancestor.mp4 137 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/230-kth-smallest-bst 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/230-kth-smallest-bst.jpg Kth Smallest Element in a BST (LeetCode 230) — Video Explanation Animated Tree revision video: Kth Smallest Element in a BST (LeetCode 230, Medium) solved with the Inorder Counting pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/11-tree/230-kth-smallest-bst.mp4 109 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/105-construct-from-preorder-inorder 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/105-construct-from-preorder-inorder.jpg Construct Binary Tree from Preorder and Inorder Traversal (LeetCode 105) — Video Explanation Animated Tree revision video: Construct Binary Tree from Preorder and Inorder Traversal (LeetCode 105, Medium) solved with the Divide and Conquer pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/11-tree/105-construct-from-preorder-inorder.mp4 136 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/297-serialize-deserialize-binary-tree 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/297-serialize-deserialize-binary-tree.jpg Serialize and Deserialize Binary Tree (LeetCode 297) — Video Explanation Animated Tree revision video: Serialize and Deserialize Binary Tree (LeetCode 297, Hard) solved with the Preorder with Null Markers pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/11-tree/297-serialize-deserialize-binary-tree.mp4 129 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/112-path-sum 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/112-path-sum.jpg Path Sum (LeetCode 112) — Video Explanation Animated Tree revision video: Path Sum (LeetCode 112, Easy) solved with the DFS with Remaining Target pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/11-tree/112-path-sum.mp4 103 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/113-path-sum-ii 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/113-path-sum-ii.jpg Path Sum II (LeetCode 113) — Video Explanation Animated Tree revision video: Path Sum II (LeetCode 113, Medium) solved with the DFS Backtracking pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/11-tree/113-path-sum-ii.mp4 111 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/129-sum-root-to-leaf-numbers 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/129-sum-root-to-leaf-numbers.jpg Sum Root to Leaf Numbers (LeetCode 129) — Video Explanation Animated Tree revision video: Sum Root to Leaf Numbers (LeetCode 129, Medium) solved with the DFS Carry Value pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/11-tree/129-sum-root-to-leaf-numbers.mp4 105 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/124-binary-tree-max-path-sum 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/124-binary-tree-max-path-sum.jpg Binary Tree Maximum Path Sum (LeetCode 124) — Video Explanation Animated Tree revision video: Binary Tree Maximum Path Sum (LeetCode 124, Hard) solved with the DFS Gain pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/11-tree/124-binary-tree-max-path-sum.mp4 130 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/94-binary-tree-inorder-traversal 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/94-binary-tree-inorder-traversal.jpg Binary Tree Inorder Traversal (LeetCode 94) — Video Explanation Animated Tree revision video: Binary Tree Inorder Traversal (LeetCode 94, Easy) solved with the Inorder with Stack pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/11-tree/94-binary-tree-inorder-traversal.mp4 117 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/1046-last-stone-weight 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/1046-last-stone-weight.jpg Last Stone Weight (LeetCode 1046) — Video Explanation Animated Heap / Priority Queue revision video: Last Stone Weight (LeetCode 1046, Easy) solved with the Max Heap Simulation pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/12-heap-priority-queue/1046-last-stone-weight.mp4 123 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/215-kth-largest-element 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/215-kth-largest-element.jpg Kth Largest Element in an Array (LeetCode 215) — Video Explanation Animated Heap / Priority Queue revision video: Kth Largest Element in an Array (LeetCode 215, Medium) solved with the Min Heap of Size K pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/12-heap-priority-queue/215-kth-largest-element.mp4 111 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/347-top-k-frequent-elements 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/347-top-k-frequent-elements.jpg Top K Frequent Elements (LeetCode 347) — Video Explanation Animated Heap / Priority Queue revision video: Top K Frequent Elements (LeetCode 347, Medium) solved with the Count + Min Heap pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/12-heap-priority-queue/347-top-k-frequent-elements.mp4 107 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/973-k-closest-points 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/973-k-closest-points.jpg K Closest Points to Origin (LeetCode 973) — Video Explanation Animated Heap / Priority Queue revision video: K Closest Points to Origin (LeetCode 973, Medium) solved with the Max Heap of Size K pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/12-heap-priority-queue/973-k-closest-points.mp4 103 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/621-task-scheduler 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/621-task-scheduler.jpg Task Scheduler (LeetCode 621) — Video Explanation Animated Heap / Priority Queue revision video: Task Scheduler (LeetCode 621, Medium) solved with the Greedy by Max Frequency pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/12-heap-priority-queue/621-task-scheduler.mp4 121 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/295-find-median-data-stream 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/295-find-median-data-stream.jpg Find Median from Data Stream (LeetCode 295) — Video Explanation Animated Heap / Priority Queue revision video: Find Median from Data Stream (LeetCode 295, Hard) solved with the Two Heaps pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/12-heap-priority-queue/295-find-median-data-stream.mp4 120 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/1971-find-path-exists 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/1971-find-path-exists.jpg Find if Path Exists in Graph (LeetCode 1971) — Video Explanation Animated Graph revision video: Find if Path Exists in Graph (LeetCode 1971, Easy) solved with the BFS / Union Find pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/13-graph/1971-find-path-exists.mp4 120 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/994-rotting-oranges 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/994-rotting-oranges.jpg Rotting Oranges (LeetCode 994) — Video Explanation Animated Graph revision video: Rotting Oranges (LeetCode 994, Medium) solved with the Multi-Source BFS pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/13-graph/994-rotting-oranges.mp4 120 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/133-clone-graph 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/133-clone-graph.jpg Clone Graph (LeetCode 133) — Video Explanation Animated Graph revision video: Clone Graph (LeetCode 133, Medium) solved with the DFS + Hash Map pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/13-graph/133-clone-graph.mp4 106 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/207-course-schedule 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/207-course-schedule.jpg Course Schedule (LeetCode 207) — Video Explanation Animated Graph revision video: Course Schedule (LeetCode 207, Medium) solved with the Topological Sort pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/13-graph/207-course-schedule.mp4 123 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/210-course-schedule-ii 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/210-course-schedule-ii.jpg Course Schedule II (LeetCode 210) — Video Explanation Animated Graph revision video: Course Schedule II (LeetCode 210, Medium) solved with the Topological Sort pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/13-graph/210-course-schedule-ii.mp4 110 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/gfg-is-graph-a-tree 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/gfg-is-graph-a-tree.jpg Is Graph a Tree? (GFG) — Video Explanation Animated Graph revision video: Is Graph a Tree? (GFG, Medium) solved with the Union Find pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/13-graph/gfg-is-graph-a-tree.mp4 115 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/417-pacific-atlantic 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/417-pacific-atlantic.jpg Pacific Atlantic Water Flow (LeetCode 417) — Video Explanation Animated Graph revision video: Pacific Atlantic Water Flow (LeetCode 417, Medium) solved with the Reverse Multi-Source DFS pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/13-graph/417-pacific-atlantic.mp4 114 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/743-network-delay-time 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/743-network-delay-time.jpg Network Delay Time (LeetCode 743) — Video Explanation Animated Graph revision video: Network Delay Time (LeetCode 743, Medium) solved with the Dijkstra pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/13-graph/743-network-delay-time.mp4 118 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/787-cheapest-flights-k-stops 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/787-cheapest-flights-k-stops.jpg Cheapest Flights Within K Stops (LeetCode 787) — Video Explanation Animated Graph revision video: Cheapest Flights Within K Stops (LeetCode 787, Medium) solved with the Bellman-Ford with Rounds pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/13-graph/787-cheapest-flights-k-stops.mp4 134 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/399-evaluate-division 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/399-evaluate-division.jpg Evaluate Division (LeetCode 399) — Video Explanation Animated Graph revision video: Evaluate Division (LeetCode 399, Medium) solved with the Weighted Graph DFS pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/13-graph/399-evaluate-division.mp4 120 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/1584-min-cost-connect-points 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/1584-min-cost-connect-points.jpg Min Cost to Connect All Points (LeetCode 1584) — Video Explanation Animated Graph revision video: Min Cost to Connect All Points (LeetCode 1584, Medium) solved with the Minimum Spanning Tree pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/13-graph/1584-min-cost-connect-points.mp4 110 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/127-word-ladder 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/127-word-ladder.jpg Word Ladder (LeetCode 127) — Video Explanation Animated Graph revision video: Word Ladder (LeetCode 127, Hard) solved with the BFS on Implicit Graph pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/13-graph/127-word-ladder.mp4 119 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/684-redundant-connection 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/684-redundant-connection.jpg Redundant Connection (LeetCode 684) — Video Explanation Animated Graph revision video: Redundant Connection (LeetCode 684, Medium) solved with the Union Find pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/13-graph/684-redundant-connection.mp4 105 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/509-fibonacci-number 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/509-fibonacci-number.jpg Fibonacci Number (LeetCode 509) — Video Explanation Animated Dynamic Programming revision video: Fibonacci Number (LeetCode 509, Easy) solved with the 1D DP pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/14-dynamic-programming/509-fibonacci-number.mp4 107 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/70-climbing-stairs 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/70-climbing-stairs.jpg Climbing Stairs (LeetCode 70) — Video Explanation Animated Dynamic Programming revision video: Climbing Stairs (LeetCode 70, Easy) solved with the 1D DP pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/14-dynamic-programming/70-climbing-stairs.mp4 91 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/746-min-cost-climbing-stairs 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/746-min-cost-climbing-stairs.jpg Min Cost Climbing Stairs (LeetCode 746) — Video Explanation Animated Dynamic Programming revision video: Min Cost Climbing Stairs (LeetCode 746, Easy) solved with the 1D DP pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/14-dynamic-programming/746-min-cost-climbing-stairs.mp4 125 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/62-unique-paths 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/62-unique-paths.jpg Unique Paths (LeetCode 62) — Video Explanation Animated Dynamic Programming revision video: Unique Paths (LeetCode 62, Easy) solved with the 2D Grid DP pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/14-dynamic-programming/62-unique-paths.mp4 94 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/63-unique-paths-ii 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/63-unique-paths-ii.jpg Unique Paths II (LeetCode 63) — Video Explanation Animated Dynamic Programming revision video: Unique Paths II (LeetCode 63, Medium) solved with the 2D Grid DP pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/14-dynamic-programming/63-unique-paths-ii.mp4 112 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/120-triangle 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/120-triangle.jpg Triangle (LeetCode 120) — Video Explanation Animated Dynamic Programming revision video: Triangle (LeetCode 120, Medium) solved with the Bottom-Up DP pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/14-dynamic-programming/120-triangle.mp4 105 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/198-house-robber 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/198-house-robber.jpg House Robber (LeetCode 198) — Video Explanation Animated Dynamic Programming revision video: House Robber (LeetCode 198, Medium) solved with the 1D DP pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/14-dynamic-programming/198-house-robber.mp4 109 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/213-house-robber-ii 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/213-house-robber-ii.jpg House Robber II (LeetCode 213) — Video Explanation Animated Dynamic Programming revision video: House Robber II (LeetCode 213, Medium) solved with the Circular 1D DP pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/14-dynamic-programming/213-house-robber-ii.mp4 103 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/152-maximum-product-subarray 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/152-maximum-product-subarray.jpg Maximum Product Subarray (LeetCode 152) — Video Explanation Animated Dynamic Programming revision video: Maximum Product Subarray (LeetCode 152, Medium) solved with the Track Max and Min pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/14-dynamic-programming/152-maximum-product-subarray.mp4 114 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/300-longest-increasing-subsequence 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/300-longest-increasing-subsequence.jpg Longest Increasing Subsequence (LeetCode 300) — Video Explanation Animated Dynamic Programming revision video: Longest Increasing Subsequence (LeetCode 300, Medium) solved with the 1D DP pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/14-dynamic-programming/300-longest-increasing-subsequence.mp4 118 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/91-decode-ways 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/91-decode-ways.jpg Decode Ways (LeetCode 91) — Video Explanation Animated Dynamic Programming revision video: Decode Ways (LeetCode 91, Medium) solved with the 1D DP pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/14-dynamic-programming/91-decode-ways.mp4 119 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/322-coin-change 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/322-coin-change.jpg Coin Change (LeetCode 322) — Video Explanation Animated Dynamic Programming revision video: Coin Change (LeetCode 322, Medium) solved with the Unbounded Knapsack pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/14-dynamic-programming/322-coin-change.mp4 126 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/1143-longest-common-subsequence 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/1143-longest-common-subsequence.jpg Longest Common Subsequence (LeetCode 1143) — Video Explanation Animated Dynamic Programming revision video: Longest Common Subsequence (LeetCode 1143, Medium) solved with the 2D String DP pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/14-dynamic-programming/1143-longest-common-subsequence.mp4 112 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/72-edit-distance 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/72-edit-distance.jpg Edit Distance (LeetCode 72) — Video Explanation Animated Dynamic Programming revision video: Edit Distance (LeetCode 72, Hard) solved with the 2D String DP pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/14-dynamic-programming/72-edit-distance.mp4 115 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/gfg-longest-common-substring 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/gfg-longest-common-substring.jpg Longest Common Substring (GFG) — Video Explanation Animated Dynamic Programming revision video: Longest Common Substring (GFG, Medium) solved with the 2D String DP pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/14-dynamic-programming/gfg-longest-common-substring.mp4 108 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/139-word-break 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/139-word-break.jpg Word Break (LeetCode 139) — Video Explanation Animated Dynamic Programming revision video: Word Break (LeetCode 139, Medium) solved with the 1D DP over Prefixes pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/14-dynamic-programming/139-word-break.mp4 110 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/416-partition-equal-subset-sum 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/416-partition-equal-subset-sum.jpg Partition Equal Subset Sum (LeetCode 416) — Video Explanation Animated Dynamic Programming revision video: Partition Equal Subset Sum (LeetCode 416, Medium) solved with the 0/1 Knapsack pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/14-dynamic-programming/416-partition-equal-subset-sum.mp4 109 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/389-find-the-difference 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/389-find-the-difference.jpg Find the Difference (LeetCode 389) — Video Explanation Animated Bit Manipulation revision video: Find the Difference (LeetCode 389, Easy) solved with the XOR on Characters pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/15-bit-manipulation/389-find-the-difference.mp4 81 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/191-number-of-1-bits 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/191-number-of-1-bits.jpg Number of 1 Bits (LeetCode 191) — Video Explanation Animated Bit Manipulation revision video: Number of 1 Bits (LeetCode 191, Easy) solved with the Brian Kernighan pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/15-bit-manipulation/191-number-of-1-bits.mp4 86 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/231-power-of-two 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/231-power-of-two.jpg Power of Two (LeetCode 231) — Video Explanation Animated Bit Manipulation revision video: Power of Two (LeetCode 231, Easy) solved with the Single Set Bit pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/15-bit-manipulation/231-power-of-two.mp4 89 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/338-counting-bits 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/338-counting-bits.jpg Counting Bits (LeetCode 338) — Video Explanation Animated Bit Manipulation revision video: Counting Bits (LeetCode 338, Easy) solved with the DP on Bits pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/15-bit-manipulation/338-counting-bits.mp4 88 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/371-sum-of-two-integers 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/371-sum-of-two-integers.jpg Sum of Two Integers (LeetCode 371) — Video Explanation Animated Bit Manipulation revision video: Sum of Two Integers (LeetCode 371, Medium) solved with the XOR + Carry pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/15-bit-manipulation/371-sum-of-two-integers.mp4 91 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/260-single-number-iii 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/260-single-number-iii.jpg Single Number III (LeetCode 260) — Video Explanation Animated Bit Manipulation revision video: Single Number III (LeetCode 260, Medium) solved with the XOR + Split by Bit pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/15-bit-manipulation/260-single-number-iii.mp4 97 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/137-single-number-ii 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/137-single-number-ii.jpg Single Number II (LeetCode 137) — Video Explanation Animated Bit Manipulation revision video: Single Number II (LeetCode 137, Medium) solved with the Bit Counting mod 3 pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/15-bit-manipulation/137-single-number-ii.mp4 82 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/287-find-the-duplicate-number 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/287-find-the-duplicate-number.jpg Find the Duplicate Number (LeetCode 287) — Video Explanation Animated Bit Manipulation revision video: Find the Duplicate Number (LeetCode 287, Medium) solved with the Bit Counting pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/15-bit-manipulation/287-find-the-duplicate-number.mp4 95 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/136-single-number 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/136-single-number.jpg Single Number (LeetCode 136) — Video Explanation Animated Bit Manipulation revision video: Single Number (LeetCode 136, Easy) solved with the XOR pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/15-bit-manipulation/136-single-number.mp4 91 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/912-bubble-sort 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/912-bubble-sort.jpg Bubble Sort (LeetCode 912) — Video Explanation Animated Sorting Algorithms revision video: Bubble Sort (LeetCode 912, Easy) solved with the Adjacent Swaps pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/16-sorting-algorithms/912-bubble-sort.mp4 102 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/912-insertion-sort 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/912-insertion-sort.jpg Insertion Sort (LeetCode 912) — Video Explanation Animated Sorting Algorithms revision video: Insertion Sort (LeetCode 912, Easy) solved with the Insert into Sorted Prefix pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/16-sorting-algorithms/912-insertion-sort.mp4 96 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/912-quick-sort 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/912-quick-sort.jpg Quick Sort (LeetCode 912) — Video Explanation Animated Sorting Algorithms revision video: Quick Sort (LeetCode 912, Medium) solved with the Partition + Recursion pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/16-sorting-algorithms/912-quick-sort.mp4 108 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/912-merge-sort 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/912-merge-sort.jpg Merge Sort (LeetCode 912) — Video Explanation Animated Sorting Algorithms revision video: Merge Sort (LeetCode 912, Medium) solved with the Divide and Conquer pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/16-sorting-algorithms/912-merge-sort.mp4 101 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/dsa-revision/912-heap-sort 2026-11-02 monthly 0.8 https://videos.dsaanimator.com/posters/912-heap-sort.jpg Heap Sort (LeetCode 912) — Video Explanation Animated Sorting Algorithms revision video: Heap Sort (LeetCode 912, Medium) solved with the Max Heap pattern — problem, brute force, key idea, dry run and Java code. https://videos.dsaanimator.com/16-sorting-algorithms/912-heap-sort.mp4 107 2026-11-01T09:00:00+05:30 yes https://dsaanimator.com/about 2026-11-02 yearly 0.3 https://dsaanimator.com/contact 2026-11-02 yearly 0.3 https://dsaanimator.com/privacy 2026-11-02 yearly 0.3 https://dsaanimator.com/terms 2026-11-02 yearly 0.3