Browse problems by topic and difficulty. 3,930 problems indexed.
| Title | Difficulty | ||
|---|---|---|---|
| Minimum Subsequence in Non-Increasing Order | Easy | Solve |
| Number of Steps to Reduce a Number in Binary Representation to One | Medium | Solve |
| Longest Happy String | Medium | Solve |
| Stone Game III | Hard | Solve |
| Top Travellers | Easy | Solve |
| String Matching in an Array | Easy | Solve |
| Queries on a Permutation With Key | Medium | Solve |
| Linked List Cycle | Easy | Solve |
| HTML Entity Parser | Medium | Solve |
| Number of Ways to Paint N × 3 Grid | Hard | Solve |
| Find the Quiet Students in All Exams | Hard | Solve |
| Minimum Value to Get Positive Step by Step Sum | Easy | Solve |
| Find the Minimum Number of Fibonacci Numbers Whose Sum Is K | Medium | Solve |
| The k-th Lexicographical String of All Happy Strings of Length n | Medium | Solve |
| Restore The Array | Hard | Solve |
| Reformat The String | Easy | Solve |
| Display Table of Food Orders in a Restaurant | Medium | Solve |
| Minimum Number of Frogs Croaking | Medium | Solve |
| Linked List Cycle II | Medium | Solve |
| Build Array Where You Can Find The Maximum Exactly K Comparisons | Hard | Solve |
| NPV Queries | Easy | Solve |
| Maximum Score After Splitting a String | Easy | Solve |
| Maximum Points You Can Obtain from Cards | Medium | Solve |
| Diagonal Traverse II | Medium | Solve |
| Constrained Subsequence Sum | Hard | Solve |