| 451. Sort Characters By Frequency | Solution | Solve | Medium | | |
| 452. Minimum Number of Arrows to Burst Balloons | Solution | Solve | Medium | | |
| 453. Minimum Moves to Equal Array Elements | Solution | Solve | Medium | | |
| 454. 4Sum II | Solution | Solve | Medium | | |
| 455. Assign Cookies | Solution | Solve | Easy | | |
| 456. 132 Pattern | Solution | Solve | Medium | | |
| 457. Circular Array Loop | Solution | Solve | Medium | | |
| 458. Poor Pigs | Solution | Solve | Hard | | |
| 459. Repeated Substring Pattern | Solution | Solve | Easy | | |
| 460. LFU Cache | Solution | Solve | Hard | | |
| 461. Hamming Distance | Solution | Solve | Easy | | |
| 462. Minimum Moves to Equal Array Elements II | Solution | Solve | Medium | | |
| 463. Island Perimeter | Solution | Solve | Easy | | |
| 464. Can I Win | Solution | Solve | Medium | | |
| 465. Optimal Account Balancing | Solution | Solve | Hard | | |
| 466. Count The Repetitions | Solution | Solve | Hard | | |
| 467. Unique Substrings in Wraparound String | Solution | Solve | Medium | | |
| 468. Validate IP Address | Solution | Solve | Medium | | |
| 469. Convex Polygon | Solution | Solve | Medium | | |
| 470. Implement Rand10() Using Rand7() | Solution | Solve | Medium | | |
| 471. Encode String with Shortest Length | Solution | Solve | Hard | | |
| 472. Concatenated Words | Solution | Solve | Hard | | |
| 473. Matchsticks to Square | Solution | Solve | Medium | | |
| 474. Ones and Zeroes | Solution | Solve | Medium | | |
| 475. Heaters | Solution | Solve | Medium | | |
| 476. Number Complement | Solution | Solve | Easy | | |
| 477. Total Hamming Distance | Solution | Solve | Medium | | |
| 478. Generate Random Point in a Circle | Solution | Solve | Medium | | |
| 479. Largest Palindrome Product | Solution | Solve | Hard | | |
| 480. Sliding Window Median | Solution | Solve | Hard | | |
| 481. Magical String | Solution | Solve | Medium | | |
| 482. License Key Formatting | Solution | Solve | Easy | | |
| 483. Smallest Good Base | Solution | Solve | Hard | | |
| 484. Find Permutation | Solution | Solve | Medium | | |
| 485. Max Consecutive Ones | Solution | Solve | Easy | | |
| 486. Predict the Winner | Solution | Solve | Medium | | |
| 487. Max Consecutive Ones II | Solution | Solve | Medium | | |
| 488. Zuma Game | Solution | Solve | Hard | | |
| 489. Robot Room Cleaner | Solution | Solve | Hard | | |
| 490. The Maze | Solution | Solve | Medium | | |
| 491. Non-decreasing Subsequences | Solution | Solve | Medium | | |
| 492. Construct the Rectangle | Solution | Solve | Easy | | |
| 493. Reverse Pairs | Solution | Solve | Hard | | |
| 494. Target Sum | Solution | Solve | Medium | | |
| 495. Teemo Attacking | Solution | Solve | Easy | | |
| 496. Next Greater Element I | Solution | Solve | Easy | | |
| 497. Random Point in Non-overlapping Rectangles | Solution | Solve | Medium | | |
| 498. Diagonal Traverse | Solution | Solve | Medium | | |
| 499. The Maze III | Solution | Solve | Hard | | |
| 500. Keyboard Row | Solution | Solve | Easy | | |
