Zopsmart
14 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 6. Zigzag Conversion | Medium | 100% | TopicsString |
| Decode String | Medium | 85.1% | TopicsStringStackRecursion |
| 42. Trapping Rain Water | Hard | 83.6% | TopicsArrayTwo PointersDynamic ProgrammingStackMonotonic Stack |
| 3602. Hexadecimal and Hexatrigesimal Conversion | Easy | 80% | TopicsMathString |
| 2074. Reverse Nodes in Even Length Groups | Medium | 75.7% | TopicsLinked List |
| 299. Bulls and Cows | Medium | 62.3% | TopicsHash TableStringCounting |
| Reverse Words in a String | Medium | 62.3% | TopicsTwo PointersString |
| 402. Remove K Digits | Medium | 56.7% | TopicsStringStackGreedyMonotonic Stack |
| 17. Letter Combinations of a Phone Number | Medium | 56.7% | TopicsHash TableStringBacktracking |
| 991. Broken Calculator | Medium | 56.7% | TopicsMathGreedy |
| 25. Reverse Nodes in k-Group | Hard | 56.7% | TopicsLinked ListRecursion |
| 5. Longest Palindromic Substring | Medium | 48.9% | TopicsTwo PointersStringDynamic ProgrammingManacher |
| 242. Valid Anagram | Easy | 48.9% | TopicsHash TableStringSorting |
| 93. Restore IP Addresses | Medium | 48.9% | TopicsStringBacktracking |
