| Leftmost Column with at Least a One | | | Medium |
| Alien Dictionary | | | Hard |
| Number of Islands II | | | Hard |
| Design Hit Counter | | | Medium |
| Bomb Enemy | | | Medium |
| Browser History with Delete Range | | | Medium |
| Reverse Pairs | | | Hard |
| Shortest Subarray with Sum at Least K | | | Hard |
| Remove K Digits | | | Medium |
| Trapping Rain Water | | | Hard |
| LRU Cache | | | Medium |
| Partition Equal Subset Sum | | | Medium |
| Super Egg Drop | | | Hard |
| Maximum of Minimums for Every Window Size | | | Hard |
| Coin Change | | | Medium |
| Number of Islands | | | Medium |
| Critical Connections in a Network | | | Hard |
| Josephus Problem | | | Medium |
| Largest Rectangle in Histogram | | | Hard |
| Maximum Subarray (Kadane's) | | | Medium |
| Longest Palindromic Substring | | | Medium |
| Single Number | | | Easy |
| Single Number II | | | Medium |
| First Non-Repeating Character | | | Easy |
| Min Stack | | | Medium |
| Implement Queue Using Stacks | | | Easy |
| Search in Rotated Sorted Array | | | Medium |
| Minimum Platforms Required | | | Medium |
| Course Schedule | | | Medium |
| Kth Largest Element in an Array | | | Medium |
| Implement Trie (Prefix Tree) | | | Medium |
| House Robber | | | Medium |
| Longest Increasing Subsequence | | | Medium |
| Edit Distance | | | Hard |
| Word Break | | | Medium |
| Unique Paths | | | Medium |
| Maximum Product Subarray | | | Medium |
| Best Time to Buy and Sell Stock II | | | Medium |
| Decode Ways | | | Medium |
| Longest Common Subsequence | | | Medium |
| Split Array Largest Sum | | | Hard |
| Painting the Walls | | | Hard |
| Binary Tree Cameras | | | Hard |
| Minimize the Maximum of Pairs | | | Medium |
| Kth Smallest Number in Multiplication Table | | | Hard |
| Minimum Number of Taps to Open to Water a Garden | | | Hard |
| Count Number of Nice Subarrays | | | Medium |
| Minimum Value to Get Positive Step by Step Sum | | | Easy |