Browse problems by topic and difficulty. 3,930 problems indexed.
| Title | Difficulty | ||
|---|---|---|---|
| Minimum Changes to Make K Semi-palindromes | Hard | Solve |
| Number of Ways to Reach Destination in the Grid | Hard | Solve |
| Subarrays Distinct Element Sum of Squares I | Easy | Solve |
| Minimum Number of Changes to Make Binary String Beautiful | Medium | Solve |
| Length of the Longest Subsequence That Sums to Target | Medium | Solve |
| Subarrays Distinct Element Sum of Squares II | Hard | Solve |
| Find the K-or of an Array | Easy | Solve |
| Minimum Equal Sum of Two Arrays After Replacing Zeros | Medium | Solve |
| Minimum Increment Operations to Make Array Beautiful | Medium | Solve |
| Nim Game | Easy | Solve |
| Maximum Points After Collecting Coins From All Nodes | Hard | Solve |
| Maximum Profitable Triplets With Increasing Prices II | Hard | Solve |
| Market Analysis III | Medium | Solve |
| Find Champion I | Easy | Solve |
| Find Champion II | Medium | Solve |
| Maximum Score After Applying Operations on a Tree | Medium | Solve |
| Maximum Balanced Subsequence Sum | Hard | Solve |
| Distribute Candies Among Children III | Hard | Solve |
| Distribute Candies Among Children I | Easy | Solve |
| Distribute Candies Among Children II | Medium | Solve |
| Flip Game | Easy | Solve |
| Number of Strings Which Can Be Rearranged to Contain Substring | Medium | Solve |
| Maximum Spending After Buying Items | Hard | Solve |
| Maximum Strong Pair XOR I | Easy | Solve |
| High-Access Employees | Medium | Solve |