1,464 problems · Solve with AI-powered hints & explanations
| # | Title | Difficulty |
|---|---|---|
| 176 | Second Highest Salary | Medium |
| 177 | Nth Highest Salary | Medium |
| 178 | Rank Scores | Medium |
| 179 | Largest Number |
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| Medium |
| 180 | Consecutive Numbers | Medium |
| 184 | Department Highest Salary | Medium |
| 187 | Repeated DNA Sequences | Medium |
| 189 | Rotate Array | Medium |
| 192 | Word Frequency | Medium |
| 194 | Transpose File | Medium |
| 198 | House Robber | Medium |
| 199 | Binary Tree Right Side View | Medium |
| 200 | Number of Islands | Medium |
| 201 | Bitwise AND of Numbers Range | Medium |
| 204 | Count Primes | Medium |
| 207 | Course Schedule | Medium |
| 208 | Implement Trie (Prefix Tree) | Medium |
| 209 | Minimum Size Subarray Sum | Medium |
| 210 | Course Schedule II | Medium |
| 211 | Design Add and Search Words Data Structure | Medium |
| 213 | House Robber II | Medium |
| 215 | Kth Largest Element in an Array | Medium |
| 216 | Combination Sum III | Medium |
| 221 | Maximal Square | Medium |
| 223 | Rectangle Area | Medium |
| 227 | Basic Calculator II | Medium |
| 229 | Majority Element II | Medium |
| 230 | Kth Smallest Element in a BST | Medium |
| 235 | Lowest Common Ancestor of a Binary Search Tree | Medium |
| 236 | Lowest Common Ancestor of a Binary Tree | Medium |
| 237 | Delete Node in a Linked List | Medium |
| 238 | Product of Array Except Self | Medium |
| 240 | Search a 2D Matrix II | Medium |
| 241 | Different Ways to Add Parentheses | Medium |
| 260 | Single Number III | Medium |
| 264 | Ugly Number II | Medium |
| 274 | H-Index | Medium |
| 275 | H-Index II | Medium |
| 279 | Perfect Squares | Medium |
| 284 | Peeking Iterator | Medium |
| 287 | Find the Duplicate Number | Medium |
| 289 | Game of Life | Medium |
| 299 | Bulls and Cows | Medium |
| 300 | Longest Increasing Subsequence | Medium |
| 304 | Range Sum Query 2D - Immutable | Medium |
| 306 | Additive Number | Medium |
| 307 | Range Sum Query - Mutable | Medium |
| 309 | Best Time to Buy and Sell Stock with Cooldown | Medium |
| 310 | Minimum Height Trees | Medium |
| 313 | Super Ugly Number | Medium |
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