| 229 | Majority Element II | Medium |
| 299 | Bulls and Cows | Medium |
| 347 | Top K Frequent Elements | Medium |
| 387 | First Unique Character in a String | Easy |
| 451 | Sort Characters By Frequency | Medium |
| 621 | Task Scheduler | Medium |
| 692 | Top K Frequent Words | Medium |
| 767 | Reorganize String | Medium |
| 811 | Subdomain Visit Count | Medium |
| 819 | Most Common Word | Easy |
| 869 | Reordered Power of 2 | Medium |
| 900 | RLE Iterator | Medium |
| 914 | X of a Kind in a Deck of Cards | Easy |
| 923 | 3Sum With Multiplicity | Medium |
| 945 | Minimum Increment to Make Array Unique | Medium |
| 992 | Subarrays with K Different Integers | Hard |
| 1010 | Pairs of Songs With Total Durations Divisible by 60 | Medium |
| 1054 | Distant Barcodes | Medium |
| 1090 | Largest Values From Labels | Medium |
| 1128 | Number of Equivalent Domino Pairs | Easy |
| 1189 | Maximum Number of Balloons | Easy |
| 1221 | Split a String in Balanced Strings | Easy |
| 1267 | Count Servers that Communicate | Medium |
| 1347 | Minimum Number of Steps to Make Two Strings Anagram | Medium |
| 1356 | Sort Integers by The Number of 1 Bits | Easy |
| 1365 | How Many Numbers Are Smaller Than the Current Number | Easy |
| 1366 | Rank Teams by Votes | Medium |
| 1370 | Increasing Decreasing String | Easy |
| 1394 | Find Lucky Integer in an Array | Easy |
| 1400 | Construct K Palindrome Strings | Medium |