Dell
14 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| Count Binary Substrings | Easy | 100% | TopicsTwo PointersString |
| 1328. Break a Palindrome | Medium | 81.3% | TopicsStringGreedy |
| 1413. Minimum Value to Get Positive Step by Step Sum | Easy | 72.3% | TopicsArrayPrefix Sum |
| 3. Longest Substring Without Repeating Characters | Medium | 66% | TopicsHash TableStringSliding Window |
| 49. Group Anagrams | Medium | 66% | TopicsArrayHash TableStringSorting |
| 1. Two Sum | Easy | 66% | TopicsArrayHash Table |
| 53. Maximum Subarray | Medium | 66% | TopicsArrayDivide and ConquerDynamic Programming |
| Delete Duplicate Emails | Easy | 57.1% | TopicsDatabase |
| Department Top Three Salaries | Hard | 57.1% | TopicsDatabase |
| 20. Valid Parentheses | Easy | 57.1% | TopicsStringStackBracket Sequences |
| 242. Valid Anagram | Easy | 57.1% | TopicsHash TableStringSorting |
| 22. Generate Parentheses | Medium | 57.1% | TopicsStringDynamic ProgrammingBacktrackingBracket Sequences |
| 21. Merge Two Sorted Lists | Easy | 57.1% | TopicsLinked ListRecursion |
| 42. Trapping Rain Water | Hard | 57.1% | TopicsArrayTwo PointersDynamic ProgrammingStackMonotonic Stack |
