| 1297. Maximum Number of Occurrences of a Substring | | | Solve | Medium | | |
| 1311. Get Watched Videos by Your Friends | | | Solve | Medium | | |
| 1338. Reduce Array Size to The Half | | | Solve | Medium | | |
| 1347. Minimum Number of Steps to Make Two Strings Anagram | | | Solve | Medium | | |
| 1348. Tweet Counts Per Frequency | | | Solve | Medium | | |
| 1357. Apply Discount Every n Orders | | | Solve | Medium | | |
| 1358. Number of Substrings Containing All Three Characters | | | Solve | Medium | | |
| 1366. Rank Teams by Votes | | | Solve | Medium | | |
| 1371. Find the Longest Substring Containing Vowels in Even Counts | | | Solve | Medium | | |
| 1386. Cinema Seat Allocation | | | Solve | Medium | | |
| 1396. Design Underground System | | | Solve | Medium | | |
| 1400. Construct K Palindrome Strings | | | Solve | Medium | | |
| 1410. HTML Entity Parser | | | Solve | Medium | | |
| 1418. Display Table of Food Orders in a Restaurant | | | Solve | Medium | | |
| 1429. First Unique Number | | | Solve | Medium | | |
| 1442. Count Triplets That Can Form Two Arrays of Equal XOR | | | Solve | Medium | - | |
| 1443. Minimum Time to Collect All Apples in a Tree | | | Solve | Medium | | |
| 1452. People Whose List of Favorite Companies Is Not a Subset of Another List | | | Solve | Medium | | |
| 1461. Check If a String Contains All Binary Codes of Size K | | | Solve | Medium | | |
| 1477. Find Two Non-overlapping Sub-arrays Each With Target Sum | | | Solve | Medium | | |
| 1481. Least Number of Unique Integers after K Removals | | | Solve | Medium | | |
| 1485. Clone Binary Tree With Random Pointer | | | Solve | Medium | | |
| 1487. Making File Names Unique | | | Solve | Medium | | |
| 1488. Avoid Flood in The City | | | Solve | Medium | | |
| 1490. Clone N-ary Tree | | | Solve | Medium | | |
| 1497. Check If Array Pairs Are Divisible by k | | | Solve | Medium | | |
| 1500. Design a File Sharing System | | | Solve | Medium | | |
| 1506. Find Root of N-Ary Tree | | | Solve | Medium | | |
| 1519. Number of Nodes in the Sub-Tree With the Same Label | | | Solve | Medium | | |
| 1525. Number of Good Ways to Split a String | | | Solve | Medium | | |
| 1540. Can Convert String in K Moves | | | Solve | Medium | | |
| 1546. Maximum Number of Non-Overlapping Subarrays With Sum Equals Target | | | Solve | Medium | | |
| 1554. Strings Differ by One Character | | | Solve | Medium | | |
| 1562. Find Latest Group of Size M | | | Solve | Medium | | |
| 1570. Dot Product of Two Sparse Vectors | | | Solve | Medium | | |
| 1577. Number of Ways Where Square of Number Is Equal to Product of Two Numbers | | | Solve | Medium | - | |
| 1590. Make Sum Divisible by P | | | Solve | Medium | | |
| 1593. Split a String Into the Max Number of Unique Substrings | | | Solve | Medium | | |
| 1600. Throne Inheritance | | | Solve | Medium | | |
| 1604. Alert Using Same Key-Card Three or More Times in a One Hour Period | | | Solve | Medium | | |
| 1612. Check If Two Expression Trees are Equivalent | | | Solve | Medium | | |
| 1630. Arithmetic Subarrays | | | Solve | Medium | | |
| 1638. Count Substrings That Differ by One Character | | | Solve | Medium | | |
| 1647. Minimum Deletions to Make Character Frequencies Unique | | | Solve | Medium | | |
| 1650. Lowest Common Ancestor of a Binary Tree III | | | Solve | Medium | | |
| 1657. Determine if Two Strings Are Close | | | Solve | Medium | | |
| 1658. Minimum Operations to Reduce X to Zero | | | Solve | Medium | | |
| 1660. Correct a Binary Tree | | | Solve | Medium | | |
| 1674. Minimum Moves to Make Array Complementary | | | Solve | Medium | | |
| 1676. Lowest Common Ancestor of a Binary Tree IV | | | Solve | Medium | | |
