| 78 | Subsets | Medium |
| 136 | Single Number | Easy |
| 137 | Single Number II | Medium |
| 169 | Majority Element | Easy |
| 187 | Repeated DNA Sequences | Medium |
| 191 | Number of 1 Bits | Easy |
| 201 | Bitwise AND of Numbers Range | Medium |
| 231 | Power of Two | Easy |
| 260 | Single Number III | Medium |
| 268 | Missing Number | Easy |
| 287 | Find the Duplicate Number | Medium |
| 338 | Counting Bits | Easy |
| 342 | Power of Four | Easy |
| 389 | Find the Difference | Easy |
| 401 | Binary Watch | Easy |
| 645 | Set Mismatch | Easy |
| 779 | K-th Symbol in Grammar | Medium |
| 980 | Unique Paths III | Hard |
| 1239 | Maximum Length of a Concatenated String with Unique Characters | Medium |
| 1318 | Minimum Flips to Make a OR b Equal to c | Medium |
| 1457 | Pseudo-Palindromic Paths in a Binary Tree | Medium |
| 1601 | Maximum Number of Achievable Transfer Requests | Hard |
| 1879 | Minimum XOR Sum of Two Arrays | Hard |
| 2305 | Fair Distribution of Cookies | Medium |
| 2433 | Find The Original Array of Prefix Xor | Medium |