| 1344. Angle Between Hands of a Clock | | | Solve | Medium | | |
| 1357. Apply Discount Every n Orders | | | Solve | Medium | | |
| 1361. Validate Binary Tree Nodes | | | Solve | Medium | | |
| 1382. Balance a Binary Search Tree | | | Solve | Medium | | |
| 1395. Count Number of Teams | | | Solve | Medium | | |
| 1398. Customers Who Bought Products A and B but Not C | | | Solve | Medium | | |
| 1424. Diagonal Traverse II | | | Solve | Medium | | |
| 1428. Leftmost Column with at Least a One | | | Solve | Medium | | |
| 1429. First Unique Number | | | Solve | Medium | | |
| 1443. Minimum Time to Collect All Apples in a Tree | | | Solve | Medium | | |
| 1445. Apples & Oranges | | | Solve | Medium | | |
| 1454. Active Users | | | Solve | Medium | | |
| 1485. Clone Binary Tree With Random Pointer | | | Solve | Medium | | |
| 1498. Number of Subsequences That Satisfy the Given Sum Condition | | | Solve | Medium | | |
| 1522. Diameter of N-Ary Tree | | | Solve | Medium | | |
| 1541. Minimum Insertions to Balance a Parentheses String | | | Solve | Medium | | |
| 1557. Minimum Number of Vertices to Reach All Nodes | | | Solve | Medium | | |
| 1559. Detect Cycles in 2D Grid | | | Solve | Medium | | |
| 1570. Dot Product of Two Sparse Vectors | | | Solve | Medium | | |
| 1586. Binary Search Tree Iterator II | | | Solve | Medium | | |
| 1644. Lowest Common Ancestor of a Binary Tree II | | | Solve | Medium | | |
| 1650. Lowest Common Ancestor of a Binary Tree III | | | Solve | Medium | | |
| 1657. Determine if Two Strings Are Close | | | Solve | Medium | | |
| 1699. Number of Calls Between Two Persons | | | Solve | Medium | | |
| 1718. Construct the Lexicographically Largest Valid Sequence | | | Solve | Medium | | |
| 1721. Swapping Nodes in a Linked List | | | Solve | Medium | | |
| 1740. Find Distance in a Binary Tree | | | Solve | Medium | | |
| 1762. Buildings With an Ocean View | | | Solve | Medium | | |
| 1778. Shortest Path in a Hidden Grid | | | Solve | Medium | | |
| 1810. Minimum Path Cost in a Hidden Grid | | | Solve | Medium | | |
| 1834. Single-Threaded CPU | | | Solve | Medium | | |
| 1868. Product of Two Run-Length Encoded Arrays | | | Solve | Medium | | |
| 1891. Cutting Ribbons | | | Solve | Medium | | |
| 1901. Find a Peak Element II | | | Solve | Medium | | |
| 1947. Maximum Compatibility Score Sum | | | Solve | Medium | | |
| 1949. Strong Friendship | | | Solve | Medium | | |
| 1963. Minimum Number of Swaps to Make the String Balanced | | | Solve | Medium | | |
| 1973. Count Nodes Equal to Sum of Descendants | | | Solve | Medium | | |
| 1976. Number of Ways to Arrive at Destination | | | Solve | Medium | | |
| 1985. Find the Kth Largest Integer in the Array | | | Solve | Medium | | |
| 2023. Number of Pairs of Strings With Concatenation Equal to Target | | | Solve | Medium | | |
| 2024. Maximize the Confusion of an Exam | | | Solve | Medium | | |
| 2033. Minimum Operations to Make a Uni-Value Grid | | | Solve | Medium | | |
| 2090. K Radius Subarray Averages | | | Solve | Medium | | |
| 2265. Count Nodes Equal to Average of Subtree | | | Solve | Medium | | |
| 2289. Steps to Make Array Non-decreasing | | | Solve | Medium | | |
| 2342. Max Sum of a Pair With Equal Sum of Digits | | | Solve | Medium | | |
| 2365. Task Scheduler II | | | Solve | Medium | | |
| 2452. Words Within Two Edits of Dictionary | | | Solve | Medium | | |
| 2461. Maximum Sum of Distinct Subarrays With Length K | | | Solve | Medium | | |
