| 1265. Print Immutable Linked List in Reverse | | | Solve | Medium | | |
| 1381. Design a Stack With Increment Operation | | | Solve | Medium | | |
| 1441. Build an Array With Stack Operations | | | Solve | Medium | | |
| 1472. Design Browser History | | | Solve | Medium | | |
| 1504. Count Submatrices With All Ones | | | Solve | Medium | | |
| 1541. Minimum Insertions to Balance a Parentheses String | | | Solve | Medium | | |
| 1574. Shortest Subarray to be Removed to Make Array Sorted | | | Solve | Medium | | |
| 1586. Binary Search Tree Iterator II | | | Solve | Medium | | |
| 1628. Design an Expression Tree With Evaluate Function | | | Solve | Medium | | |
| 1653. Minimum Deletions to Make String Balanced | | | Solve | Medium | | |
| 1673. Find the Most Competitive Subsequence | | | Solve | Medium | | |
| 1717. Maximum Score From Removing Substrings | | | Solve | Medium | | |
| 1756. Design Most Recently Used Queue | | | Solve | Medium | | |
| 1762. Buildings With an Ocean View | | | Solve | Medium | | |
| 1856. Maximum Subarray Min-Product | | | Solve | Medium | | |
| 1910. Remove All Occurrences of a Substring | | | Solve | Medium | | |
| 1950. Maximum of Minimum Values in All Subarrays | | | Solve | Medium | | |
| 1963. Minimum Number of Swaps to Make the String Balanced | | | Solve | Medium | | |
| 1996. The Number of Weak Characters in the Game | | | Solve | Medium | | |
| 2104. Sum of Subarray Ranges | | | Solve | Medium | | |
| 2116. Check if a Parentheses String Can Be Valid | | | Solve | Medium | | |
| 2130. Maximum Twin Sum of a Linked List | | | Solve | Medium | | |
| 2211. Count Collisions on a Road | | | Solve | Medium | | |
| 2216. Minimum Deletions to Make Array Beautiful | | | Solve | Medium | | |
| 2282. Number of People That Can Be Seen in a Grid | | | Solve | Medium | | |
| 2289. Steps to Make Array Non-decreasing | | | Solve | Medium | | |
| 2297. Jump Game VIII | | | Solve | Medium | | |
| 2345. Finding the Number of Visible Mountains | | | Solve | Medium | | |
| 2375. Construct Smallest Number From DI String | | | Solve | Medium | | |
| 2390. Removing Stars From a String | | | Solve | Medium | | |
| 2434. Using a Robot to Print the Lexicographically Smallest String | | | Solve | Medium | | |
| 2487. Remove Nodes From Linked List | | | Solve | Medium | | |
| 2645. Minimum Additions to Make Valid String | | | Solve | Medium | | |
| 2764. Is Array a Preorder of Some Binary Tree | | | Solve | Medium | - | |
| 2816. Double a Number Represented as a Linked List | | | Solve | Medium | | |
| 2832. Maximal Range That Each Element Is Maximum in It | | | Solve | Medium | | |
| 2863. Maximum Length of Semi-Decreasing Subarrays | | | Solve | Medium | | |
| 2865. Beautiful Towers I | | | Solve | Medium | | |
| 2866. Beautiful Towers II | | | Solve | Medium | | |
| 3170. Lexicographically Minimum String After Removing Stars | | | Solve | Medium | - | |
| 3205. Maximum Array Hopping Score I | | | Solve | Medium | - | |
| 3221. Maximum Array Hopping Score II | | | Solve | Medium | - | |
