| 736. Parse Lisp Expression | | | Solve | Hard | | |
| 739. Daily Temperatures | | | Solve | Medium | | |
| 768. Max Chunks To Make Sorted II | | | Solve | Hard | | |
| 769. Max Chunks To Make Sorted | | | Solve | Medium | | |
| 770. Basic Calculator IV | | | Solve | Hard | | |
| 772. Basic Calculator III | | | Solve | Hard | | |
| 844. Backspace String Compare | | | Solve | Easy | | |
| 853. Car Fleet | | | Solve | Medium | | |
| 856. Score of Parentheses | | | Solve | Medium | | |
| 880. Decoded String at Index | | | Solve | Medium | | |
| 895. Maximum Frequency Stack | | | Solve | Hard | | |
| 897. Increasing Order Search Tree | | | Solve | Easy | | |
| 901. Online Stock Span | | | Solve | Medium | | |
| 907. Sum of Subarray Minimums | | | Solve | Medium | | |
| 921. Minimum Add to Make Parentheses Valid | | | Solve | Medium | | |
| 936. Stamping The Sequence | | | Solve | Hard | - | |
| 946. Validate Stack Sequences | | | Solve | Medium | | |
| 962. Maximum Width Ramp | | | Solve | Medium | | |
| 975. Odd Even Jump | | | Solve | Hard | | |
| 1003. Check If Word Is Valid After Substitutions | | | Solve | Medium | | |
| 1006. Clumsy Factorial | | | Solve | Medium | | |
| 1008. Construct Binary Search Tree from Preorder Traversal | | | Solve | Medium | | |
| 1019. Next Greater Node In Linked List | | | Solve | Medium | | |
| 1021. Remove Outermost Parentheses | | | Solve | Easy | | |
| 1047. Remove All Adjacent Duplicates In String | | | Solve | Easy | | |
| 1063. Number of Valid Subarrays | | | Solve | Hard | | |
| 1081. Smallest Subsequence of Distinct Characters | | | Solve | Medium | | |
| 1096. Brace Expansion II | | | Solve | Hard | | |
| 1106. Parsing A Boolean Expression | | | Solve | Hard | | |
| 1111. Maximum Nesting Depth of Two Valid Parentheses Strings | | | Solve | Medium | | |
| 1124. Longest Well-Performing Interval | | | Solve | Medium | | |
| 1130. Minimum Cost Tree From Leaf Values | | | Solve | Medium | | |
| 1172. Dinner Plate Stacks | | | Solve | Hard | - | |
| 1190. Reverse Substrings Between Each Pair of Parentheses | | | Solve | Medium | | |
| 1209. Remove All Adjacent Duplicates in String II | | | Solve | Medium | | |
| 1214. Two Sum BSTs | | | Solve | Medium | | |
| 1249. Minimum Remove to Make Valid Parentheses | | | Solve | Medium | | |
| 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 | | |
| 1475. Final Prices With a Special Discount in a Shop | | | Solve | Easy | | |
| 1504. Count Submatrices With All Ones | | | Solve | Medium | | |
| 1526. Minimum Number of Increments on Subarrays to Form a Target Array | | | Solve | Hard | | |
| 1541. Minimum Insertions to Balance a Parentheses String | | | Solve | Medium | | |
| 1544. Make The String Great | | | Solve | Easy | | |
| 1574. Shortest Subarray to be Removed to Make Array Sorted | | | Solve | Medium | | |
| 1586. Binary Search Tree Iterator II | | | Solve | Medium | | |
| 1597. Build Binary Expression Tree From Infix Expression | | | Solve | Hard | | |
| 1598. Crawler Log Folder | | | Solve | Easy | | |
