| 1593 | Split a String Into the Max Number of Unique Substrings | Medium |
| 1600 | Throne Inheritance | Medium |
| 1604 | Alert Using Same Key-Card Three or More Times in a One Hour Period | Medium |
| 1624 | Largest Substring Between Two Equal Characters | Easy |
| 1636 | Sort Array by Increasing Frequency | Easy |
| 1638 | Count Substrings That Differ by One Character | Medium |
| 1640 | Check Array Formation Through Concatenation | Easy |
| 1656 | Design an Ordered Stream | Easy |
| 1657 | Determine if Two Strings Are Close | Medium |
| 1658 | Minimum Operations to Reduce X to Zero | Medium |
| 1674 | Minimum Moves to Make Array Complementary | Medium |
| 1679 | Max Number of K-Sum Pairs | Medium |
| 1684 | Count the Number of Consistent Strings | Easy |
| 1695 | Maximum Erasure Value | Medium |
| 1711 | Count Good Meals | Medium |
| 1713 | Minimum Operations to Make a Subsequence | Hard |
| 1726 | Tuple with Same Product | Medium |
| 1737 | Change Minimum Characters to Satisfy One of Three Conditions | Medium |
| 1742 | Maximum Number of Balls in a Box | Easy |
| 1743 | Restore the Array From Adjacent Pairs | Medium |
| 1748 | Sum of Unique Elements | Easy |
| 1763 | Longest Nice Substring | Easy |
| 1775 | Equal Sum Arrays With Minimum Number of Operations | Medium |
| 1781 | Sum of Beauty of All Substrings | Medium |
| 1790 | Check if One String Swap Can Make Strings Equal | Easy |
| 1796 | Second Largest Digit in a String | Easy |
| 1797 | Design Authentication Manager | Medium |
| 1805 | Number of Different Integers in a String | Easy |
| 1807 | Evaluate the Bracket Pairs of a String | Medium |
| 1814 | Count Nice Pairs in an Array | Medium |