Haven't decided if I am going to submit code to it yet
👍 - Unlocked & Done 😊 - Locked & Done 🔒 - Locked & Not Done [] - Not yet Done
| Status | Number | Title | Difficulty | Companies | Top Interview Question |
|---|---|---|---|---|---|
| 👍 | 1 | Two Sum | Easy | LinkedIn, Uber, Airbnb, Facebook | Top Interview Question |
| [] | 10 | Regular Expression Matching | Hard | Google, Uber, Airbnb, Facebook | Top Interview Question |
| 👍 | 13 | Roman to Integer | Easy | Uber, Facebook | Top Interview Question |
| 👍 | 15 | 3Sum | Medium | Top Interview Question | |
| 👍 | 17 | Letter Combinations of a Phone Number | Medium | Google, Uber, Facebook | Top Interview Question |
| 👍 | 20 | Valid Parentheses | Easy | Google, Airbnb, Facebook | Top Interview Question |
| [] | 23 | Merge k Sorted Lists | Hard | LinkedIn, Google, Uber, Airbnb, Facebook | Top Interview Question |
| [] | 25 | Reverse Nodes in k-Group | Hard | ||
| 👍 | 26 | Remove Duplicates from Sorted Array | Easy | Top Interview Question | |
| 👍 | 28 | Implement strStr() | Easy | Top Interview Question | |
| 👍 | 33 | Search in Rotated Sorted Array | Medium | LinkedIn, Uber, Facebook | Top Interview Question |
| 👍 | 38 | Count and Say | Easy | Top Interview Question | |
| [] | 43 | Multiply Strings | Medium | ||
| [] | 44 | Wildcard Matching | Hard | Google, Facebook | Top Interview Question |
| 👍 | 49 | Group Anagrams | Medium | Uber, Facebook | Top Interview Question |
| 👍 | 50 | Pow(x, n) | Medium | LinkedIn, Google, Facebook | Top Interview Question |
| 👍 | 56 | Merge Intervals | Medium | LinkedIn, Google, Facebook | Top Interview Question |
| [] | 57 | Insert Interval | Hard | LinkedIn, Google, Facebook | |
| [] | 67 | Add Binary | Easy | ||
| [] | 69 | Sqrt(x) | Easy | Top Interview Question | |
| [] | 71 | Simplify Path | Medium | ||
| 👍 | 75 | Sort Colors | Medium | Top Interview Question | |
| [] | 76 | Minimum Window Substring | Hard | LinkedIn, Uber, Facebook | Top Interview Question |
| 👍 | 78 | Subsets | Medium | Uber, Facebook | Top Interview Question |
| 👍 | 79 | Word Search | Medium | Top Interview Question | |
| [] | 80 | Remove Duplicates from Sorted Array II | Medium | ||
| [] | 85 | Maximal Rectangle | Hard | ||
| 👍 | 88 | Merge Sorted Array | Easy | Top Interview Question | |
| [] | 90 | Subsets II | Medium | ||
| [] | 91 | Decode Ways | Medium | Uber, Facebook | Top Interview Question |
| 👍 | 98 | Validate Binary Search Tree | Medium | Top Interview Question | |
| 👍 | 102 | Binary Tree Level Order Traversal | Medium | LinkedIn, Facebook | Top Interview Question |
| [] | 117 | Populating Next Right Pointers in Each Node II | Medium | ||
| 👍 | 121 | Best Time to Buy and Sell Stock | Easy | Uber, Facebook | Top Interview Question |
| 👍 | 125 | Valid Palindrome | Easy | Uber, Facebook | Top Interview Question |
| [] | 127 | Word Ladder | Medium | LinkedIn, Facebook | Top Interview Question |
| [] | 128 | Longest Consecutive Sequence | Hard | Google, Facebook | Top Interview Question |
| [] | 133 | Clone Graph | Medium | Google, Uber, Facebook | |
| [] | 139 | Word Break | Medium | Google, Uber, Facebook | Top Interview Question |
| [] | 146 | LRU Cache | Hard | Google, Uber, Facebook | Top Interview Question |
| [] | 157 | Read N Characters Given Read4 | Easy | ||
| [] | 158 | Read N Characters Given Read4 II - Call multiple times | Hard | Google, Facebook | |
| [] | 161 | One Edit Distance | Medium | Uber, Facebook | |
| [] | 168 | Excel Sheet Column Title | Easy | ||
| [] | 173 | Binary Search Tree Iterator | Medium | LinkedIn, Google, Facebook | |
| [] | 200 | Number of Islands | Medium | Google, Facebook | Top Interview Question |
| 👍 | 206 | Reverse Linked List | Easy | Uber, Facebook | Top Interview Question |
| [] | 208 | Implement Trie (Prefix Tree) | Medium | Google, Uber, Facebook | Top Interview Question |
| [] | 209 | Minimum Size Subarray Sum | Medium | ||
| [] | 210 | Course Schedule II | Medium | Top Interview Question | |
| [] | 211 | Add and Search Word - Data structure design | Medium | ||
| 👍 | 215 | Kth Largest Element in an Array | Medium | Top Interview Question | |
| [] | 218 | The Skyline Problem | Hard | Google, Facebook | Top Interview Question |
| [] | 221 | Maximal Square | Medium | Airbnb, Facebook | |
| 👍 | 234 | Palindrome Linked List | Easy | Top Interview Question | |
| [] | 235 | Lowest Common Ancestor of a Binary Search Tree | Easy | ||
| [] | 236 | Lowest Common Ancestor of a Binary Tree | Medium | LinkedIn, Facebook | Top Interview Question |
| [] | 238 | Product of Array Except Self | Medium | LinkedIn, Facebook | Top Interview Question |
| [] | 252 | Meeting Rooms | Easy | ||
| [] | 253 | Meeting Rooms II | Medium | Google, Facebook | Top Interview Question |
| [] | 257 | Binary Tree Paths | Easy | Google, Facebook | |
| [] | 261 | Graph Valid Tree | Medium | Google, Facebook | |
| [] | 265 | Paint House II | Hard | ||
| [] | 269 | Alien Dictionary | Hard | Google, Airbnb, Facebook | Top Interview Question |
| [] | 273 | Integer to English Words | Hard | ||
| [] | 274 | H-Index | Medium | Google, Facebook | |
| [] | 275 | H-Index II | Medium | ||
| [] | 277 | Find the Celebrity | Medium | LinkedIn, Facebook | Top Interview Question |
| 👍 | 278 | First Bad Version | Easy | ||
| [] | 282 | Expression Add Operators | Hard | Google, Facebook | |
| 👍 | 283 | Move Zeroes | Easy | Top Interview Question | |
| [] | 285 | Inorder Successor in BST | Medium | ||
| [] | 286 | Walls and Gates | Medium | Google, Facebook | |
| [] | 297 | Serialize and Deserialize Binary Tree | Hard | LinkedIn, Google, Uber, Facebook | Top Interview Question |
| [] | 301 | Remove Invalid Parentheses | Hard | ||
| [] | 311 | Sparse Matrix Multiplication | Medium | LinkedIn, Facebook | |
| [] | 314 | Binary Tree Vertical Order Traversal | Medium | Google, Facebook | |
| [] | 325 | Maximum Size Subarray Sum Equals k | Medium | ||
| 👍 | 334 | Increasing Triplet Subsequence | Medium | Top Interview Question |
last update to list was in 2019