| 220 | Contains Duplicate III | Medium |
| 229 | Majority Element II | Medium |
| 268 | Missing Number | Easy |
| 274 | H-Index | Medium |
| 295 | Find Median from Data Stream | Hard |
| 324 | Wiggle Sort II | Medium |
| 347 | Top K Frequent Elements | Medium |
| 349 | Intersection of Two Arrays | Easy |
| 350 | Intersection of Two Arrays II | Easy |
| 354 | Russian Doll Envelopes | Hard |
| 368 | Largest Divisible Subset | Medium |
| 389 | Find the Difference | Easy |
| 406 | Queue Reconstruction by Height | Medium |
| 414 | Third Maximum Number | Easy |
| 435 | Non-overlapping Intervals | Medium |
| 436 | Find Right Interval | Medium |
| 451 | Sort Characters By Frequency | Medium |
| 452 | Minimum Number of Arrows to Burst Balloons | Medium |
| 455 | Assign Cookies | Easy |
| 462 | Minimum Moves to Equal Array Elements II | Medium |
| 475 | Heaters | Medium |
| 502 | IPO | Hard |
| 506 | Relative Ranks | Easy |
| 522 | Longest Uncommon Subsequence II | Medium |
| 524 | Longest Word in Dictionary through Deleting | Medium |
| 532 | K-diff Pairs in an Array | Medium |
| 539 | Minimum Time Difference | Medium |
| 561 | Array Partition | Easy |
| 581 | Shortest Unsorted Continuous Subarray | Medium |
| 594 | Longest Harmonious Subsequence | Easy |