| 351. Android Unlock Patterns | Solution | Solve | Medium | | |
| 352. Data Stream as Disjoint Intervals | Solution | Solve | Hard | | |
| 353. Design Snake Game | Solution | Solve | Medium | | |
| 354. Russian Doll Envelopes | Solution | Solve | Hard | | |
| 355. Design Twitter | Solution | Solve | Medium | | |
| 356. Line Reflection | Solution | Solve | Medium | | |
| 357. Count Numbers with Unique Digits | Solution | Solve | Medium | | |
| 358. Rearrange String k Distance Apart | Solution | Solve | Hard | | |
| 359. Logger Rate Limiter | Solution | Solve | Easy | | |
| 360. Sort Transformed Array | Solution | Solve | Medium | | |
| 361. Bomb Enemy | Solution | Solve | Medium | | |
| 362. Design Hit Counter | Solution | Solve | Medium | | |
| 363. Max Sum of Rectangle No Larger Than K | Solution | Solve | Hard | | |
| 364. Nested List Weight Sum II | Solution | Solve | Medium | | |
| 365. Water and Jug Problem | Solution | Solve | Medium | | |
| 366. Find Leaves of Binary Tree | Solution | Solve | Medium | | |
| 367. Valid Perfect Square | Solution | Solve | Easy | | |
| 368. Largest Divisible Subset | Solution | Solve | Medium | | |
| 369. Plus One Linked List | Solution | Solve | Medium | | |
| 370. Range Addition | Solution | Solve | Medium | | |
| 371. Sum of Two Integers | Solution | Solve | Medium | | |
| 372. Super Pow | Solution | Solve | Medium | | |
| 373. Find K Pairs with Smallest Sums | Solution | Solve | Medium | | |
| 374. Guess Number Higher or Lower | Solution | Solve | Easy | | |
| 375. Guess Number Higher or Lower II | Solution | Solve | Medium | | |
| 376. Wiggle Subsequence | Solution | Solve | Medium | | |
| 377. Combination Sum IV | Solution | Solve | Medium | | |
| 378. Kth Smallest Element in a Sorted Matrix | Solution | Solve | Medium | | |
| 379. Design Phone Directory | Solution | Solve | Medium | | |
| 380. Insert Delete GetRandom O(1) | Solution | Solve | Medium | | |
| 381. Insert Delete GetRandom O(1) - Duplicates allowed | Solution | Solve | Hard | | |
| 382. Linked List Random Node | Solution | Solve | Medium | | |
| 383. Ransom Note | Solution | Solve | Easy | | |
| 384. Shuffle an Array | Solution | Solve | Medium | | |
| 385. Mini Parser | Solution | Solve | Medium | | |
| 386. Lexicographical Numbers | Solution | Solve | Medium | | |
| 387. First Unique Character in a String | Solution | Solve | Easy | | |
| 388. Longest Absolute File Path | Solution | Solve | Medium | | |
| 389. Find the Difference | Solution | Solve | Easy | | |
| 390. Elimination Game | Solution | Solve | Medium | | |
| 391. Perfect Rectangle | Solution | Solve | Hard | | |
| 392. Is Subsequence | Solution | Solve | Easy | | |
| 393. UTF-8 Validation | Solution | Solve | Medium | | |
| 394. Decode String | Solution | Solve | Medium | | |
| 395. Longest Substring with At Least K Repeating Characters | Solution | Solve | Medium | | |
| 396. Rotate Function | Solution | Solve | Medium | | |
| 397. Integer Replacement | Solution | Solve | Medium | | |
| 398. Random Pick Index | Solution | Solve | Medium | | |
| 399. Evaluate Division | Solution | Solve | Medium | | |
| 400. Nth Digit | Solution | Solve | Medium | | |
