Crack coding interviews, one pattern at a time

1. Mark Two Sum as solved 1 Two Sum Easy Practice Two Sum on LeetCode (opens in a new tab) Revise Two Sum later
2. Mark Contains Duplicate as solved 2 Contains Duplicate Easy Practice Contains Duplicate on LeetCode (opens in a new tab) Revise Contains Duplicate later
3. Mark Valid Anagram as solved 3 Valid Anagram Easy Practice Valid Anagram on LeetCode (opens in a new tab) Revise Valid Anagram later
4. Mark Best Time to Buy and Sell Stock as solved 4 Best Time to Buy and Sell Stock Easy Practice Best Time to Buy and Sell Stock on LeetCode (opens in a new tab) Revise Best Time to Buy and Sell Stock later
5. Mark Majority Element as solved 5 Majority Element Easy Practice Majority Element on LeetCode (opens in a new tab) Revise Majority Element later
6. Mark Move Zeroes as solved 6 Move Zeroes Easy Practice Move Zeroes on LeetCode (opens in a new tab) Revise Move Zeroes later
7. Mark Merge Sorted Array as solved 7 Merge Sorted Array Easy Practice Merge Sorted Array on LeetCode (opens in a new tab) Revise Merge Sorted Array later
8. Mark Group Anagrams as solved 8 Group Anagrams Medium Practice Group Anagrams on LeetCode (opens in a new tab) Revise Group Anagrams later
9. Mark Top K Frequent Elements as solved 9 Top K Frequent Elements Medium Practice Top K Frequent Elements on LeetCode (opens in a new tab) Revise Top K Frequent Elements later
10. Mark Product of Array Except Self as solved 10 Product of Array Except Self Medium Practice Product of Array Except Self on LeetCode (opens in a new tab) Revise Product of Array Except Self later
11. Mark Longest Consecutive Sequence as solved 11 Longest Consecutive Sequence Medium Practice Longest Consecutive Sequence on LeetCode (opens in a new tab) Revise Longest Consecutive Sequence later
12. Mark Maximum Subarray as solved 12 Maximum Subarray Medium Practice Maximum Subarray on LeetCode (opens in a new tab) Revise Maximum Subarray later
13. Mark Subarray Sum Equals K as solved 13 Subarray Sum Equals K Medium Practice Subarray Sum Equals K on LeetCode (opens in a new tab) Revise Subarray Sum Equals K later
14. Mark Sort Colors as solved 14 Sort Colors Medium Practice Sort Colors on LeetCode (opens in a new tab) Revise Sort Colors later
15. Mark Next Permutation as solved 15 Next Permutation Medium Practice Next Permutation on LeetCode (opens in a new tab) Revise Next Permutation later

About the Arrays & Hashing problems

1. Mark Valid Palindrome as solved 16 Valid Palindrome Easy Practice Valid Palindrome on LeetCode (opens in a new tab) Revise Valid Palindrome later
2. Mark Remove Duplicates from Sorted Array as solved 17 Remove Duplicates from Sorted Array Easy Practice Remove Duplicates from Sorted Array on LeetCode (opens in a new tab) Revise Remove Duplicates from Sorted Array later
3. Mark Two Sum II – Input Array Is Sorted as solved 18 Two Sum II – Input Array Is Sorted Medium Practice Two Sum II – Input Array Is Sorted on LeetCode (opens in a new tab) Revise Two Sum II – Input Array Is Sorted later
4. Mark 3Sum as solved 19 3Sum Medium Practice 3Sum on LeetCode (opens in a new tab) Revise 3Sum later
5. Mark Container With Most Water as solved 20 Container With Most Water Medium Practice Container With Most Water on LeetCode (opens in a new tab) Revise Container With Most Water later
6. Mark Trapping Rain Water as solved 21 Trapping Rain Water Hard Practice Trapping Rain Water on LeetCode (opens in a new tab) Revise Trapping Rain Water later

About the Two Pointers problems

1. Mark Longest Substring Without Repeating Characters as solved 22 Longest Substring Without Repeating Characters Medium Practice Longest Substring Without Repeating Characters on LeetCode (opens in a new tab) Revise Longest Substring Without Repeating Characters later
2. Mark Longest Repeating Character Replacement as solved 23 Longest Repeating Character Replacement Medium Practice Longest Repeating Character Replacement on LeetCode (opens in a new tab) Revise Longest Repeating Character Replacement later
3. Mark Permutation in String as solved 24 Permutation in String Medium Practice Permutation in String on LeetCode (opens in a new tab) Revise Permutation in String later
4. Mark Max Consecutive Ones III as solved 25 Max Consecutive Ones III Medium Practice Max Consecutive Ones III on LeetCode (opens in a new tab) Revise Max Consecutive Ones III later
5. Mark Minimum Window Substring as solved 26 Minimum Window Substring Hard Practice Minimum Window Substring on LeetCode (opens in a new tab) Revise Minimum Window Substring later
6. Mark Sliding Window Maximum as solved 27 Sliding Window Maximum Hard Practice Sliding Window Maximum on LeetCode (opens in a new tab) Revise Sliding Window Maximum later

About the Sliding Window problems

1. Mark Pascal’s Triangle as solved 28 Pascal’s Triangle Easy Practice Pascal’s Triangle on LeetCode (opens in a new tab) Revise Pascal’s Triangle later
2. Mark Set Matrix Zeroes as solved 29 Set Matrix Zeroes Medium Practice Set Matrix Zeroes on LeetCode (opens in a new tab) Revise Set Matrix Zeroes later
3. Mark Rotate Image as solved 30 Rotate Image Medium Practice Rotate Image on LeetCode (opens in a new tab) Revise Rotate Image later
4. Mark Spiral Matrix as solved 31 Spiral Matrix Medium Practice Spiral Matrix on LeetCode (opens in a new tab) Revise Spiral Matrix later
5. Mark Valid Sudoku as solved 32 Valid Sudoku Medium Practice Valid Sudoku on LeetCode (opens in a new tab) Revise Valid Sudoku later

About the Matrix problems

1. Mark Valid Parentheses as solved 33 Valid Parentheses Easy Practice Valid Parentheses on LeetCode (opens in a new tab) Revise Valid Parentheses later
2. Mark Next Greater Element I as solved 34 Next Greater Element I Easy Practice Next Greater Element I on LeetCode (opens in a new tab) Revise Next Greater Element I later
3. Mark Min Stack as solved 35 Min Stack Medium Practice Min Stack on LeetCode (opens in a new tab) Revise Min Stack later
4. Mark Evaluate Reverse Polish Notation as solved 36 Evaluate Reverse Polish Notation Medium Practice Evaluate Reverse Polish Notation on LeetCode (opens in a new tab) Revise Evaluate Reverse Polish Notation later
5. Mark Daily Temperatures as solved 37 Daily Temperatures Medium Practice Daily Temperatures on LeetCode (opens in a new tab) Revise Daily Temperatures later
6. Mark Asteroid Collision as solved 38 Asteroid Collision Medium Practice Asteroid Collision on LeetCode (opens in a new tab) Revise Asteroid Collision later
7. Mark Largest Rectangle in Histogram as solved 39 Largest Rectangle in Histogram Hard Practice Largest Rectangle in Histogram on LeetCode (opens in a new tab) Revise Largest Rectangle in Histogram later

About the Stack problems

1. Mark Binary Search as solved 40 Binary Search Easy Practice Binary Search on LeetCode (opens in a new tab) Revise Binary Search later
2. Mark Search a 2D Matrix as solved 41 Search a 2D Matrix Medium Practice Search a 2D Matrix on LeetCode (opens in a new tab) Revise Search a 2D Matrix later
3. Mark Find First and Last Position of Element in Sorted Array as solved 42 Find First and Last Position of Element in Sorted Array Medium Practice Find First and Last Position of Element in Sorted Array on LeetCode (opens in a new tab) Revise Find First and Last Position of Element in Sorted Array later
4. Mark Find Peak Element as solved 43 Find Peak Element Medium Practice Find Peak Element on LeetCode (opens in a new tab) Revise Find Peak Element later
5. Mark Koko Eating Bananas as solved 44 Koko Eating Bananas Medium Practice Koko Eating Bananas on LeetCode (opens in a new tab) Revise Koko Eating Bananas later
6. Mark Find Minimum in Rotated Sorted Array as solved 45 Find Minimum in Rotated Sorted Array Medium Practice Find Minimum in Rotated Sorted Array on LeetCode (opens in a new tab) Revise Find Minimum in Rotated Sorted Array later
7. Mark Search in Rotated Sorted Array as solved 46 Search in Rotated Sorted Array Medium Practice Search in Rotated Sorted Array on LeetCode (opens in a new tab) Revise Search in Rotated Sorted Array later
8. Mark Median of Two Sorted Arrays as solved 47 Median of Two Sorted Arrays Hard Practice Median of Two Sorted Arrays on LeetCode (opens in a new tab) Revise Median of Two Sorted Arrays later

About the Binary Search problems

1. Mark Reverse Linked List as solved 48 Reverse Linked List Easy Practice Reverse Linked List on LeetCode (opens in a new tab) Revise Reverse Linked List later
2. Mark Merge Two Sorted Lists as solved 49 Merge Two Sorted Lists Easy Practice Merge Two Sorted Lists on LeetCode (opens in a new tab) Revise Merge Two Sorted Lists later
3. Mark Linked List Cycle as solved 50 Linked List Cycle Easy Practice Linked List Cycle on LeetCode (opens in a new tab) Revise Linked List Cycle later
4. Mark Middle of the Linked List as solved 51 Middle of the Linked List Easy Practice Middle of the Linked List on LeetCode (opens in a new tab) Revise Middle of the Linked List later
5. Mark Palindrome Linked List as solved 52 Palindrome Linked List Easy Practice Palindrome Linked List on LeetCode (opens in a new tab) Revise Palindrome Linked List later
6. Mark Intersection of Two Linked Lists as solved 53 Intersection of Two Linked Lists Easy Practice Intersection of Two Linked Lists on LeetCode (opens in a new tab) Revise Intersection of Two Linked Lists later
7. Mark Remove Nth Node From End of List as solved 54 Remove Nth Node From End of List Medium Practice Remove Nth Node From End of List on LeetCode (opens in a new tab) Revise Remove Nth Node From End of List later
8. Mark Linked List Cycle II as solved 55 Linked List Cycle II Medium Practice Linked List Cycle II on LeetCode (opens in a new tab) Revise Linked List Cycle II later
9. Mark Reorder List as solved 56 Reorder List Medium Practice Reorder List on LeetCode (opens in a new tab) Revise Reorder List later
10. Mark Add Two Numbers as solved 57 Add Two Numbers Medium Practice Add Two Numbers on LeetCode (opens in a new tab) Revise Add Two Numbers later
11. Mark Copy List with Random Pointer as solved 58 Copy List with Random Pointer Medium Practice Copy List with Random Pointer on LeetCode (opens in a new tab) Revise Copy List with Random Pointer later
12. Mark LRU Cache as solved 59 LRU Cache Medium Practice LRU Cache on LeetCode (opens in a new tab) Revise LRU Cache later
13. Mark Merge k Sorted Lists as solved 60 Merge k Sorted Lists Hard Practice Merge k Sorted Lists on LeetCode (opens in a new tab) Revise Merge k Sorted Lists later
14. Mark Reverse Nodes in k-Group as solved 61 Reverse Nodes in k-Group Hard Practice Reverse Nodes in k-Group on LeetCode (opens in a new tab) Revise Reverse Nodes in k-Group later

About the Linked List problems

1. Mark Binary Tree Inorder Traversal as solved 62 Binary Tree Inorder Traversal Easy Practice Binary Tree Inorder Traversal on LeetCode (opens in a new tab) Revise Binary Tree Inorder Traversal later
2. Mark Maximum Depth of Binary Tree as solved 63 Maximum Depth of Binary Tree Easy Practice Maximum Depth of Binary Tree on LeetCode (opens in a new tab) Revise Maximum Depth of Binary Tree later
3. Mark Invert Binary Tree as solved 64 Invert Binary Tree Easy Practice Invert Binary Tree on LeetCode (opens in a new tab) Revise Invert Binary Tree later
4. Mark Same Tree as solved 65 Same Tree Easy Practice Same Tree on LeetCode (opens in a new tab) Revise Same Tree later
5. Mark Symmetric Tree as solved 66 Symmetric Tree Easy Practice Symmetric Tree on LeetCode (opens in a new tab) Revise Symmetric Tree later
6. Mark Diameter of Binary Tree as solved 67 Diameter of Binary Tree Easy Practice Diameter of Binary Tree on LeetCode (opens in a new tab) Revise Diameter of Binary Tree later
7. Mark Balanced Binary Tree as solved 68 Balanced Binary Tree Easy Practice Balanced Binary Tree on LeetCode (opens in a new tab) Revise Balanced Binary Tree later
8. Mark Subtree of Another Tree as solved 69 Subtree of Another Tree Easy Practice Subtree of Another Tree on LeetCode (opens in a new tab) Revise Subtree of Another Tree later
9. Mark Binary Tree Level Order Traversal as solved 70 Binary Tree Level Order Traversal Medium Practice Binary Tree Level Order Traversal on LeetCode (opens in a new tab) Revise Binary Tree Level Order Traversal later
10. Mark Binary Tree Right Side View as solved 71 Binary Tree Right Side View Medium Practice Binary Tree Right Side View on LeetCode (opens in a new tab) Revise Binary Tree Right Side View later
11. Mark Binary Tree Zigzag Level Order Traversal as solved 72 Binary Tree Zigzag Level Order Traversal Medium Practice Binary Tree Zigzag Level Order Traversal on LeetCode (opens in a new tab) Revise Binary Tree Zigzag Level Order Traversal later
12. Mark Validate Binary Search Tree as solved 73 Validate Binary Search Tree Medium Practice Validate Binary Search Tree on LeetCode (opens in a new tab) Revise Validate Binary Search Tree later
13. Mark Kth Smallest Element in a BST as solved 74 Kth Smallest Element in a BST Medium Practice Kth Smallest Element in a BST on LeetCode (opens in a new tab) Revise Kth Smallest Element in a BST later
14. Mark Lowest Common Ancestor of a Binary Search Tree as solved 75 Lowest Common Ancestor of a Binary Search Tree Medium Practice Lowest Common Ancestor of a Binary Search Tree on LeetCode (opens in a new tab) Revise Lowest Common Ancestor of a Binary Search Tree later
15. Mark Lowest Common Ancestor of a Binary Tree as solved 76 Lowest Common Ancestor of a Binary Tree Medium Practice Lowest Common Ancestor of a Binary Tree on LeetCode (opens in a new tab) Revise Lowest Common Ancestor of a Binary Tree later
16. Mark Construct Binary Tree from Preorder and Inorder Traversal as solved 77 Construct Binary Tree from Preorder and Inorder Traversal Medium Practice Construct Binary Tree from Preorder and Inorder Traversal on LeetCode (opens in a new tab) Revise Construct Binary Tree from Preorder and Inorder Traversal later
17. Mark Binary Tree Maximum Path Sum as solved 78 Binary Tree Maximum Path Sum Hard Practice Binary Tree Maximum Path Sum on LeetCode (opens in a new tab) Revise Binary Tree Maximum Path Sum later
18. Mark Serialize and Deserialize Binary Tree as solved 79 Serialize and Deserialize Binary Tree Hard Practice Serialize and Deserialize Binary Tree on LeetCode (opens in a new tab) Revise Serialize and Deserialize Binary Tree later

About the Trees problems

1. Mark Last Stone Weight as solved 80 Last Stone Weight Easy Practice Last Stone Weight on LeetCode (opens in a new tab) Revise Last Stone Weight later
2. Mark Kth Largest Element in an Array as solved 81 Kth Largest Element in an Array Medium Practice Kth Largest Element in an Array on LeetCode (opens in a new tab) Revise Kth Largest Element in an Array later
3. Mark K Closest Points to Origin as solved 82 K Closest Points to Origin Medium Practice K Closest Points to Origin on LeetCode (opens in a new tab) Revise K Closest Points to Origin later
4. Mark Task Scheduler as solved 83 Task Scheduler Medium Practice Task Scheduler on LeetCode (opens in a new tab) Revise Task Scheduler later
5. Mark Find Median from Data Stream as solved 84 Find Median from Data Stream Hard Practice Find Median from Data Stream on LeetCode (opens in a new tab) Revise Find Median from Data Stream later

About the Heap / Priority Queue problems

1. Mark Subsets as solved 85 Subsets Medium Practice Subsets on LeetCode (opens in a new tab) Revise Subsets later
2. Mark Subsets II as solved 86 Subsets II Medium Practice Subsets II on LeetCode (opens in a new tab) Revise Subsets II later
3. Mark Permutations as solved 87 Permutations Medium Practice Permutations on LeetCode (opens in a new tab) Revise Permutations later
4. Mark Combination Sum as solved 88 Combination Sum Medium Practice Combination Sum on LeetCode (opens in a new tab) Revise Combination Sum later
5. Mark Combination Sum II as solved 89 Combination Sum II Medium Practice Combination Sum II on LeetCode (opens in a new tab) Revise Combination Sum II later
6. Mark Letter Combinations of a Phone Number as solved 90 Letter Combinations of a Phone Number Medium Practice Letter Combinations of a Phone Number on LeetCode (opens in a new tab) Revise Letter Combinations of a Phone Number later
7. Mark Generate Parentheses as solved 91 Generate Parentheses Medium Practice Generate Parentheses on LeetCode (opens in a new tab) Revise Generate Parentheses later
8. Mark Word Search as solved 92 Word Search Medium Practice Word Search on LeetCode (opens in a new tab) Revise Word Search later
9. Mark Palindrome Partitioning as solved 93 Palindrome Partitioning Medium Practice Palindrome Partitioning on LeetCode (opens in a new tab) Revise Palindrome Partitioning later
10. Mark N-Queens as solved 94 N-Queens Hard Practice N-Queens on LeetCode (opens in a new tab) Revise N-Queens later

About the Backtracking problems

1. Mark Implement Trie (Prefix Tree) as solved 95 Implement Trie (Prefix Tree) Medium Practice Implement Trie (Prefix Tree) on LeetCode (opens in a new tab) Revise Implement Trie (Prefix Tree) later
2. Mark Design Add and Search Words Data Structure as solved 96 Design Add and Search Words Data Structure Medium Practice Design Add and Search Words Data Structure on LeetCode (opens in a new tab) Revise Design Add and Search Words Data Structure later
3. Mark Word Search II as solved 97 Word Search II Hard Practice Word Search II on LeetCode (opens in a new tab) Revise Word Search II later

About the Tries problems

1. Mark Flood Fill as solved 98 Flood Fill Easy Practice Flood Fill on LeetCode (opens in a new tab) Revise Flood Fill later
2. Mark Number of Islands as solved 99 Number of Islands Medium Practice Number of Islands on LeetCode (opens in a new tab) Revise Number of Islands later
3. Mark Max Area of Island as solved 100 Max Area of Island Medium Practice Max Area of Island on LeetCode (opens in a new tab) Revise Max Area of Island later
4. Mark Clone Graph as solved 101 Clone Graph Medium Practice Clone Graph on LeetCode (opens in a new tab) Revise Clone Graph later
5. Mark Rotting Oranges as solved 102 Rotting Oranges Medium Practice Rotting Oranges on LeetCode (opens in a new tab) Revise Rotting Oranges later
6. Mark 01 Matrix as solved 103 01 Matrix Medium Practice 01 Matrix on LeetCode (opens in a new tab) Revise 01 Matrix later
7. Mark Surrounded Regions as solved 104 Surrounded Regions Medium Practice Surrounded Regions on LeetCode (opens in a new tab) Revise Surrounded Regions later
8. Mark Pacific Atlantic Water Flow as solved 105 Pacific Atlantic Water Flow Medium Practice Pacific Atlantic Water Flow on LeetCode (opens in a new tab) Revise Pacific Atlantic Water Flow later
9. Mark Course Schedule as solved 106 Course Schedule Medium Practice Course Schedule on LeetCode (opens in a new tab) Revise Course Schedule later
10. Mark Course Schedule II as solved 107 Course Schedule II Medium Practice Course Schedule II on LeetCode (opens in a new tab) Revise Course Schedule II later
11. Mark Is Graph Bipartite? as solved 108 Is Graph Bipartite? Medium Practice Is Graph Bipartite? on LeetCode (opens in a new tab) Revise Is Graph Bipartite? later
12. Mark Word Ladder as solved 109 Word Ladder Hard Practice Word Ladder on LeetCode (opens in a new tab) Revise Word Ladder later

About the Graphs problems

1. Mark Number of Provinces as solved 110 Number of Provinces Medium Practice Number of Provinces on LeetCode (opens in a new tab) Revise Number of Provinces later
2. Mark Redundant Connection as solved 111 Redundant Connection Medium Practice Redundant Connection on LeetCode (opens in a new tab) Revise Redundant Connection later
3. Mark Network Delay Time as solved 112 Network Delay Time Medium Practice Network Delay Time on LeetCode (opens in a new tab) Revise Network Delay Time later
4. Mark Cheapest Flights Within K Stops as solved 113 Cheapest Flights Within K Stops Medium Practice Cheapest Flights Within K Stops on LeetCode (opens in a new tab) Revise Cheapest Flights Within K Stops later
5. Mark Min Cost to Connect All Points as solved 114 Min Cost to Connect All Points Medium Practice Min Cost to Connect All Points on LeetCode (opens in a new tab) Revise Min Cost to Connect All Points later

About the Advanced Graphs problems

1. Mark Climbing Stairs as solved 115 Climbing Stairs Easy Practice Climbing Stairs on LeetCode (opens in a new tab) Revise Climbing Stairs later
2. Mark Min Cost Climbing Stairs as solved 116 Min Cost Climbing Stairs Easy Practice Min Cost Climbing Stairs on LeetCode (opens in a new tab) Revise Min Cost Climbing Stairs later
3. Mark House Robber as solved 117 House Robber Medium Practice House Robber on LeetCode (opens in a new tab) Revise House Robber later
4. Mark House Robber II as solved 118 House Robber II Medium Practice House Robber II on LeetCode (opens in a new tab) Revise House Robber II later
5. Mark Coin Change as solved 119 Coin Change Medium Practice Coin Change on LeetCode (opens in a new tab) Revise Coin Change later
6. Mark Maximum Product Subarray as solved 120 Maximum Product Subarray Medium Practice Maximum Product Subarray on LeetCode (opens in a new tab) Revise Maximum Product Subarray later
7. Mark Word Break as solved 121 Word Break Medium Practice Word Break on LeetCode (opens in a new tab) Revise Word Break later
8. Mark Decode Ways as solved 122 Decode Ways Medium Practice Decode Ways on LeetCode (opens in a new tab) Revise Decode Ways later
9. Mark Longest Increasing Subsequence as solved 123 Longest Increasing Subsequence Medium Practice Longest Increasing Subsequence on LeetCode (opens in a new tab) Revise Longest Increasing Subsequence later
10. Mark Partition Equal Subset Sum as solved 124 Partition Equal Subset Sum Medium Practice Partition Equal Subset Sum on LeetCode (opens in a new tab) Revise Partition Equal Subset Sum later
11. Mark Longest Palindromic Substring as solved 125 Longest Palindromic Substring Medium Practice Longest Palindromic Substring on LeetCode (opens in a new tab) Revise Longest Palindromic Substring later
12. Mark Palindromic Substrings as solved 126 Palindromic Substrings Medium Practice Palindromic Substrings on LeetCode (opens in a new tab) Revise Palindromic Substrings later

About the 1-D Dynamic Programming problems

1. Mark Unique Paths as solved 127 Unique Paths Medium Practice Unique Paths on LeetCode (opens in a new tab) Revise Unique Paths later
2. Mark Minimum Path Sum as solved 128 Minimum Path Sum Medium Practice Minimum Path Sum on LeetCode (opens in a new tab) Revise Minimum Path Sum later
3. Mark Longest Common Subsequence as solved 129 Longest Common Subsequence Medium Practice Longest Common Subsequence on LeetCode (opens in a new tab) Revise Longest Common Subsequence later
4. Mark Edit Distance as solved 130 Edit Distance Medium Practice Edit Distance on LeetCode (opens in a new tab) Revise Edit Distance later
5. Mark Coin Change II as solved 131 Coin Change II Medium Practice Coin Change II on LeetCode (opens in a new tab) Revise Coin Change II later
6. Mark Target Sum as solved 132 Target Sum Medium Practice Target Sum on LeetCode (opens in a new tab) Revise Target Sum later
7. Mark Best Time to Buy and Sell Stock with Cooldown as solved 133 Best Time to Buy and Sell Stock with Cooldown Medium Practice Best Time to Buy and Sell Stock with Cooldown on LeetCode (opens in a new tab) Revise Best Time to Buy and Sell Stock with Cooldown later
8. Mark Distinct Subsequences as solved 134 Distinct Subsequences Hard Practice Distinct Subsequences on LeetCode (opens in a new tab) Revise Distinct Subsequences later

About the 2-D Dynamic Programming problems

1. Mark Jump Game as solved 135 Jump Game Medium Practice Jump Game on LeetCode (opens in a new tab) Revise Jump Game later
2. Mark Jump Game II as solved 136 Jump Game II Medium Practice Jump Game II on LeetCode (opens in a new tab) Revise Jump Game II later
3. Mark Gas Station as solved 137 Gas Station Medium Practice Gas Station on LeetCode (opens in a new tab) Revise Gas Station later
4. Mark Hand of Straights as solved 138 Hand of Straights Medium Practice Hand of Straights on LeetCode (opens in a new tab) Revise Hand of Straights later
5. Mark Partition Labels as solved 139 Partition Labels Medium Practice Partition Labels on LeetCode (opens in a new tab) Revise Partition Labels later
6. Mark Valid Parenthesis String as solved 140 Valid Parenthesis String Medium Practice Valid Parenthesis String on LeetCode (opens in a new tab) Revise Valid Parenthesis String later

About the Greedy problems

1. Mark Merge Intervals as solved 141 Merge Intervals Medium Practice Merge Intervals on LeetCode (opens in a new tab) Revise Merge Intervals later
2. Mark Insert Interval as solved 142 Insert Interval Medium Practice Insert Interval on LeetCode (opens in a new tab) Revise Insert Interval later
3. Mark Non-overlapping Intervals as solved 143 Non-overlapping Intervals Medium Practice Non-overlapping Intervals on LeetCode (opens in a new tab) Revise Non-overlapping Intervals later
4. Mark Minimum Number of Arrows to Burst Balloons as solved 144 Minimum Number of Arrows to Burst Balloons Medium Practice Minimum Number of Arrows to Burst Balloons on LeetCode (opens in a new tab) Revise Minimum Number of Arrows to Burst Balloons later

About the Intervals problems

1. Mark Single Number as solved 145 Single Number Easy Practice Single Number on LeetCode (opens in a new tab) Revise Single Number later
2. Mark Number of 1 Bits as solved 146 Number of 1 Bits Easy Practice Number of 1 Bits on LeetCode (opens in a new tab) Revise Number of 1 Bits later
3. Mark Counting Bits as solved 147 Counting Bits Easy Practice Counting Bits on LeetCode (opens in a new tab) Revise Counting Bits later
4. Mark Missing Number as solved 148 Missing Number Easy Practice Missing Number on LeetCode (opens in a new tab) Revise Missing Number later
5. Mark Reverse Bits as solved 149 Reverse Bits Easy Practice Reverse Bits on LeetCode (opens in a new tab) Revise Reverse Bits later
6. Mark Pow(x, n) as solved 150 Pow(x, n) Medium Practice Pow(x, n) on LeetCode (opens in a new tab) Revise Pow(x, n) later
7. Mark Sum of Two Integers as solved 151 Sum of Two Integers Medium Practice Sum of Two Integers on LeetCode (opens in a new tab) Revise Sum of Two Integers later

About the Bit Manipulation & Math problems