Browse problems by topic and difficulty. 3,930 problems indexed.
| Title | Difficulty | ||
|---|---|---|---|
| Number of Valid Move Combinations On Chessboard | Hard | Solve |
| Smallest Index With Equal Value | Easy | Solve |
| Find the Minimum and Maximum Number of Nodes Between Critical Points | Medium | Solve |
| Minimum Operations to Convert Number | Medium | Solve |
| Reverse Linked List | Easy | Solve |
| Check if an Original String Exists Given Two Encoded Strings | Hard | Solve |
| Number of Spaces Cleaning Robot Cleaned | Medium | Solve |
| Count Vowel Substrings of a String | Easy | Solve |
| Vowels of All Substrings | Medium | Solve |
| Minimized Maximum of Products Distributed to Any Store | Medium | Solve |
| Maximum Path Quality of a Graph | Hard | Solve |
| Account Balance | Medium | Solve |
| Number of Equal Count Substrings | Medium | Solve |
| Check Whether Two Strings are Almost Equivalent | Easy | Solve |
| Walking Robot Simulation II | Medium | Solve |
| Course Schedule | Medium | Solve |
| Most Beautiful Item for Each Query | Medium | Solve |
| Maximum Number of Tasks You Can Assign | Hard | Solve |
| The Winner University | Easy | Solve |
| Time Needed to Buy Tickets | Easy | Solve |
| Reverse Nodes in Even Length Groups | Medium | Solve |
| Decode the Slanted Ciphertext | Medium | Solve |
| Process Restricted Friend Requests | Hard | Solve |
| Paths in Maze That Lead to Same Room | Medium | Solve |
| Two Furthest Houses With Different Colors | Easy | Solve |