1,464 problems · Solve with AI-powered hints & explanations
| # | Title | Difficulty |
|---|---|---|
| 316 | Remove Duplicate Letters | Medium |
| 318 | Maximum Product of Word Lengths | Medium |
| 319 | Bulb Switcher |
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| Medium |
| 322 | Coin Change | Medium |
| 324 | Wiggle Sort II | Medium |
| 328 | Odd Even Linked List | Medium |
| 331 | Verify Preorder Serialization of a Binary Tree | Medium |
| 334 | Increasing Triplet Subsequence | Medium |
| 337 | House Robber III | Medium |
| 341 | Flatten Nested List Iterator | Medium |
| 343 | Integer Break | Medium |
| 347 | Top K Frequent Elements | Medium |
| 355 | Design Twitter | Medium |
| 357 | Count Numbers with Unique Digits | Medium |
| 365 | Water and Jug Problem | Medium |
| 368 | Largest Divisible Subset | Medium |
| 371 | Sum of Two Integers | Medium |
| 372 | Super Pow | Medium |
| 373 | Find K Pairs with Smallest Sums | Medium |
| 375 | Guess Number Higher or Lower II | Medium |
| 376 | Wiggle Subsequence | Medium |
| 377 | Combination Sum IV | Medium |
| 378 | Kth Smallest Element in a Sorted Matrix | Medium |
| 380 | Insert Delete GetRandom O(1) | Medium |
| 382 | Linked List Random Node | Medium |
| 384 | Shuffle an Array | Medium |
| 385 | Mini Parser | Medium |
| 386 | Lexicographical Numbers | Medium |
| 388 | Longest Absolute File Path | Medium |
| 390 | Elimination Game | Medium |
| 393 | UTF-8 Validation | Medium |
| 394 | Decode String | Medium |
| 395 | Longest Substring with At Least K Repeating Characters | Medium |
| 396 | Rotate Function | Medium |
| 397 | Integer Replacement | Medium |
| 398 | Random Pick Index | Medium |
| 399 | Evaluate Division | Medium |
| 400 | Nth Digit | Medium |
| 402 | Remove K Digits | Medium |
| 406 | Queue Reconstruction by Height | Medium |
| 413 | Arithmetic Slices | Medium |
| 416 | Partition Equal Subset Sum | Medium |
| 417 | Pacific Atlantic Water Flow | Medium |
| 419 | Battleships in a Board | Medium |
| 421 | Maximum XOR of Two Numbers in an Array | Medium |
| 423 | Reconstruct Original Digits from English | Medium |
| 424 | Longest Repeating Character Replacement | Medium |
| 427 | Construct Quad Tree | Medium |
| 429 | N-ary Tree Level Order Traversal | Medium |
| 430 | Flatten a Multilevel Doubly Linked List | Medium |
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