| 1240. Tiling a Rectangle with the Fewest Squares | | | Solve | Hard | | |
| 1246. Palindrome Removal | | | Solve | Hard | | |
| 1250. Check If It Is a Good Array | | | Solve | Hard | | |
| 1255. Maximum Score Words Formed by Letters | | | Solve | Hard | | |
| 1259. Handshakes That Don't Cross | | | Solve | Hard | | |
| 1263. Minimum Moves to Move a Box to Their Target Location | | | Solve | Hard | | |
| 1269. Number of Ways to Stay in the Same Place After Some Steps | | | Solve | Hard | | |
| 1274. Number of Ships in a Rectangle | | | Solve | Hard | | |
| 1278. Palindrome Partitioning III | | | Solve | Hard | - | |
| 1284. Minimum Number of Flips to Convert Binary Matrix to Zero Matrix | | | Solve | Hard | | |
| 1289. Minimum Falling Path Sum II | | | Solve | Hard | | |
| 1293. Shortest Path in a Grid with Obstacles Elimination | | | Solve | Hard | | |
| 1298. Maximum Candies You Can Get from Boxes | | | Solve | Hard | | |
| 1301. Number of Paths with Max Score | | | Solve | Hard | | |
| 1307. Verbal Arithmetic Puzzle | | | Solve | Hard | | |
| 1312. Minimum Insertion Steps to Make a String Palindrome | | | Solve | Hard | | |
| 1316. Distinct Echo Substrings | | | Solve | Hard | | |
| 1320. Minimum Distance to Type a Word Using Two Fingers | | | Solve | Hard | | |
| 1326. Minimum Number of Taps to Open to Water a Garden | | | Solve | Hard | | |
| 1330. Reverse Subarray To Maximize Array Value | | | Solve | Hard | | |
| 1335. Minimum Difficulty of a Job Schedule | | | Solve | Hard | | |
| 1336. Number of Transactions per Visit | | | Solve | Hard | | |
| 1340. Jump Game V | | | Solve | Hard | | |
| 1345. Jump Game IV | | | Solve | Hard | | |
| 1349. Maximum Students Taking Exam | | | Solve | Hard | | |
| 1354. Construct Target Array With Multiple Sums | | | Solve | Hard | | |
| 1359. Count All Valid Pickup and Delivery Options | | | Solve | Hard | | |
| 1363. Largest Multiple of Three | | | Solve | Hard | | |
| 1368. Minimum Cost to Make at Least One Valid Path in a Grid | | | Solve | Hard | | |
| 1369. Get the Second Most Recent Activity | | | Solve | Hard | | |
| 1373. Maximum Sum BST in Binary Tree | | | Solve | Hard | | |
| 1377. Frog Position After T Seconds | | | Solve | Hard | | |
| 1383. Maximum Performance of a Team | | | Solve | Hard | | |
| 1384. Total Sales Amount by Year | | | Solve | Hard | - | |
| 1388. Pizza With 3n Slices | | | Solve | Hard | | |
| 1392. Longest Happy Prefix | | | Solve | Hard | | |
| 1397. Find All Good Strings | | | Solve | Hard | | |
| 1402. Reducing Dishes | | | Solve | Hard | | |
| 1406. Stone Game III | | | Solve | Hard | | |
| 1411. Number of Ways to Paint N × 3 Grid | | | Solve | Hard | | |
| 1412. Find the Quiet Students in All Exams | | | Solve | Hard | - | |
| 1416. Restore The Array | | | Solve | Hard | | |
| 1420. Build Array Where You Can Find The Maximum Exactly K Comparisons | | | Solve | Hard | | |
| 1425. Constrained Subsequence Sum | | | Solve | Hard | | |
| 1434. Number of Ways to Wear Different Hats to Each Other | | | Solve | Hard | | |
| 1439. Find the Kth Smallest Sum of a Matrix With Sorted Rows | | | Solve | Hard | | |
| 1444. Number of Ways of Cutting a Pizza | | | Solve | Hard | | |
| 1449. Form Largest Integer With Digits That Add up to Target | | | Solve | Hard | | |
| 1453. Maximum Number of Darts Inside of a Circular Dartboard | | | Solve | Hard | | |
| 1458. Max Dot Product of Two Subsequences | | | Solve | Hard | | |
