| Design In-Memory File System | Hard | 48.4% | 92.8% |
| Minimum Window Substring | Hard | 47.0% | 90.9% |
| Word Search II | Hard | 38.1% | 89.8% |
| Step-By-Step Directions From a Binary Tree Node to Another | Medium | 56.4% | 82.3% |
| Find All Anagrams in a String | Medium | 53.3% | 80.7% |
| Count Vowel Substrings of a String | Easy | 72.9% | 77.3% |
| String Transformation | Hard | 26.7% | 75.3% |
| Number of Ways to Form a Target String Given a Dictionary | Hard | 56.6% | 70.8% |
| Shortest Word Distance | Easy | 66.2% | 61.7% |
| Simplify Path | Medium | 50.0% | 61.7% |
| Basic Calculator | Hard | 46.6% | 61.7% |
| Web Crawler | Medium | 68.8% | 57.6% |
| Design Add and Search Words Data Structure | Medium | 48.2% | 57.6% |
| Time Based Key-Value Store | Medium | 49.7% | 57.6% |
| Remove Sub-Folders from the Filesystem | Medium | 78.6% | 57.6% |
| Regular Expression Matching | Hard | 30.5% | 52.7% |
| Design Log Storage System | Medium | 59.3% | 52.7% |
| Integer to English Words | Hard | 34.8% | 46.3% |
| Reverse Only Letters | Easy | 68.2% | 46.3% |
| Roman to Integer | Easy | 66.3% | 46.3% |
| Basic Calculator II | Medium | 46.7% | 37.4% |
| Maximum Number of Removable Characters | Medium | 46.9% | 37.4% |
| Valid Word Abbreviation | Easy | 37.0% | 37.4% |
| Implement Trie (Prefix Tree) | Medium | 69.2% | 37.4% |
| Remove K Digits | Medium | 36.4% | 37.4% |
| Alert Using Same Key-Card Three or More Times in a One Hour Period | Medium | 46.1% | 37.4% |
| Word Search | Medium | 46.9% | 37.4% |
| Design File System | Medium | 65.1% | 37.4% |
| Encode and Decode Strings | Medium | 51.2% | 37.4% |
