| 10 | https://leetcode.com/problems/regular-expression-matching | Regular Expression Matching | Hard | 30.4% | 100.0% |
| 12 | https://leetcode.com/problems/integer-to-roman | Integer to Roman | Medium | 70.4% | 100.0% |
| 20 | https://leetcode.com/problems/valid-parentheses | Valid Parentheses | Easy | 43.7% | 100.0% |
| 23 | https://leetcode.com/problems/merge-k-sorted-lists | Merge k Sorted Lists | Hard | 58.8% | 100.0% |
| 42 | https://leetcode.com/problems/trapping-rain-water | Trapping Rain Water | Hard | 66.8% | 100.0% |
| 43 | https://leetcode.com/problems/multiply-strings | Multiply Strings | Medium | 43.5% | 100.0% |
| 44 | https://leetcode.com/problems/wildcard-matching | Wildcard Matching | Hard | 31.3% | 100.0% |
| 56 | https://leetcode.com/problems/merge-intervals | Merge Intervals | Medium | 51.1% | 100.0% |
| 60 | https://leetcode.com/problems/permutation-sequence | Permutation Sequence | Hard | 52.1% | 100.0% |
| 118 | https://leetcode.com/problems/pascals-triangle | Pascal's Triangle | Easy | 78.7% | 100.0% |
| 140 | https://leetcode.com/problems/word-break-ii | Word Break II | Hard | 55.1% | 100.0% |
| 146 | https://leetcode.com/problems/lru-cache | LRU Cache | Medium | 46.8% | 100.0% |
| 2073 | https://leetcode.com/problems/time-needed-to-buy-tickets | Time Needed to Buy Tickets | Easy | 72.1% | 100.0% |
| 149 | https://leetcode.com/problems/max-points-on-a-line | Max Points on a Line | Hard | 30.2% | 100.0% |
| 161 | https://leetcode.com/problems/one-edit-distance | One Edit Distance | Medium | 34.5% | 100.0% |
| 202 | https://leetcode.com/problems/happy-number | Happy Number | Easy | 59.2% | 100.0% |
| 206 | https://leetcode.com/problems/reverse-linked-list | Reverse Linked List | Easy | 80.2% | 100.0% |
| 208 | https://leetcode.com/problems/implement-trie-prefix-tree | Implement Trie (Prefix Tree) | Medium | 69.2% | 100.0% |
| 218 | https://leetcode.com/problems/the-skyline-problem | The Skyline Problem | Hard | 45.0% | 100.0% |
| 235 | https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-search-tree | Lowest Common Ancestor of a Binary Search Tree | Medium | 70.0% | 100.0% |
| 251 | https://leetcode.com/problems/flatten-2d-vector | Flatten 2D Vector | Medium | 50.4% | 100.0% |
| 269 | https://leetcode.com/problems/alien-dictionary | Alien Dictionary | Hard | 37.1% | 100.0% |
| 296 | https://leetcode.com/problems/best-meeting-point | Best Meeting Point | Hard | 61.4% | 100.0% |
| 1206 | https://leetcode.com/problems/design-skiplist | Design Skiplist | Hard | 59.1% | 100.0% |
| 323 | https://leetcode.com/problems/number-of-connected-components-in-an-undirected-graph | Number of Connected Components in an Undirected Graph | Medium | 64.8% | 100.0% |
| 341 | https://leetcode.com/problems/flatten-nested-list-iterator | Flatten Nested List Iterator | Medium | 65.6% | 100.0% |
| 355 | https://leetcode.com/problems/design-twitter | Design Twitter | Medium | 44.2% | 100.0% |
| 378 | https://leetcode.com/problems/kth-smallest-element-in-a-sorted-matrix | Kth Smallest Element in a Sorted Matrix | Medium | 64.4% | 100.0% |
| 380 | https://leetcode.com/problems/insert-delete-getrandom-o1 | Insert Delete GetRandom O(1) | Medium | 55.3% | 100.0% |
| 407 | https://leetcode.com/problems/trapping-rain-water-ii | Trapping Rain Water II | Hard | 64.0% | 100.0% |
| 433 | https://leetcode.com/problems/minimum-genetic-mutation | Minimum Genetic Mutation | Medium | 56.4% | 100.0% |
| 1347 | https://leetcode.com/problems/minimum-number-of-steps-to-make-two-strings-anagram | Minimum Number of Steps to Make Two Strings Anagram | Medium | 82.5% | 100.0% |
| 1348 | https://leetcode.com/problems/tweet-counts-per-frequency | Tweet Counts Per Frequency | Medium | 45.9% | 100.0% |
| 468 | https://leetcode.com/problems/validate-ip-address | Validate IP Address | Medium | 28.2% | 100.0% |
| 580 | https://leetcode.com/problems/count-student-number-in-departments | Count Student Number in Departments | Medium | 59.9% | 100.0% |
| 1459 | https://leetcode.com/problems/rectangles-area | Rectangles Area | Medium | 68.7% | 100.0% |
| 585 | https://leetcode.com/problems/investments-in-2016 | Investments in 2016 | Medium | 50.8% | 100.0% |
| 586 | https://leetcode.com/problems/customer-placing-the-largest-number-of-orders | Customer Placing the Largest Number of Orders | Easy | 64.3% | 100.0% |
| 608 | https://leetcode.com/problems/tree-node | Tree Node | Medium | 75.2% | 100.0% |
| 1683 | https://leetcode.com/problems/invalid-tweets | Invalid Tweets | Easy | 85.2% | 100.0% |
| 2768 | https://leetcode.com/problems/number-of-black-blocks | Number of Black Blocks | Medium | 41.5% | 100.0% |
| 831 | https://leetcode.com/problems/masking-personal-information | Masking Personal Information | Medium | 53.9% | 100.0% |
| 1797 | https://leetcode.com/problems/design-authentication-manager | Design Authentication Manager | Medium | 58.4% | 100.0% |
| 1785 | https://leetcode.com/problems/minimum-elements-to-add-to-form-a-given-sum | Minimum Elements to Add to Form a Given Sum | Medium | 45.0% | 100.0% |
| 868 | https://leetcode.com/problems/binary-gap | Binary Gap | Easy | 65.7% | 100.0% |
| 1817 | https://leetcode.com/problems/finding-the-users-active-minutes | Finding the Users Active Minutes | Medium | 80.8% | 100.0% |
| 1882 | https://leetcode.com/problems/process-tasks-using-servers | Process Tasks Using Servers | Medium | 41.9% | 100.0% |
| 1910 | https://leetcode.com/problems/remove-all-occurrences-of-a-substring | Remove All Occurrences of a Substring | Medium | 78.4% | 100.0% |
| 1905 | https://leetcode.com/problems/count-sub-islands | Count Sub Islands | Medium | 73.0% | 100.0% |
| 528 | https://leetcode.com/problems/random-pick-with-weight | Random Pick with Weight | Medium | 48.9% | 50.0% |
| 994 | https://leetcode.com/problems/rotting-oranges | Rotting Oranges | Medium | 58.1% | 50.0% |
| 764 | https://leetcode.com/problems/largest-plus-sign | Largest Plus Sign | Medium | 49.0% | 62.5% |
| 1167 | https://leetcode.com/problems/minimum-cost-to-connect-sticks | Minimum Cost to Connect Sticks | Medium | 71.8% | 50.0% |