Browse problems by topic and difficulty. 3,930 problems indexed.
| Title | Difficulty | ||
|---|---|---|---|
| Find Kth Character in Expanded String | Medium | Solve | |
| Easy |
| Solve |
| Minimum String Length After Balanced Removals | Medium | Solve |
| Count Distinct Integers After Removing Zeros | Medium | Solve |
| Count Stable Subarrays | Hard | Solve |
| Evaluate Valid Expressions | Hard | Solve |
| Guess Number Higher or Lower II | Medium | Solve |
| Minimum Number of Flips to Reverse Binary String | Easy | Solve |
| Total Waviness of Numbers in Range I | Medium | Solve |
| Lexicographically Smallest Negated Permutation that Sums to Target | Medium | Solve |
| Total Waviness of Numbers in Range II | Hard | Solve |
| Concatenate Non-Zero Digits and Multiply by Sum I | Easy | Solve |
| Find Maximum Balanced XOR Subarray Length | Medium | Solve |
| Concatenate Non-Zero Digits and Multiply by Sum II | Medium | Solve |
| Number of Effective Subsequences | Hard | Solve |
| Convert Number Words to Digits | Medium | Solve |
| Count Elements With at Least K Greater Values | Medium | Solve |
| Wiggle Subsequence | Medium | Solve |
| Maximum Substrings With Distinct Start | Medium | Solve |
| Minimum Absolute Distance Between Mirror Pairs | Medium | Solve |
| Minimum Operations to Equalize Subarrays | Hard | Solve |
| Maximum Total Sum with Threshold Constraints | Medium | Solve |
| Most Common Course Pairs | Hard | Solve |
| Complete Prime Number | Medium | Solve |
| Minimum Operations to Make Binary Palindrome | Medium | Solve |