HCL
17 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 1. Two Sum | Easy | 100% | TopicsArrayHash Table |
| 121. Best Time to Buy and Sell Stock | Easy | 89.3% | TopicsArrayDynamic Programming |
| 20. Valid Parentheses | Easy | 81.3% | TopicsStringStackBracket Sequences |
| 3. Longest Substring Without Repeating Characters | Medium | 76.1% | TopicsHash TableStringSliding Window |
| 88. Merge Sorted Array | Easy | 76.1% | TopicsArrayTwo PointersSorting |
| 125. Valid Palindrome | Easy | 76.1% | TopicsTwo PointersString |
| Second Highest Salary | Medium | 69.3% | TopicsDatabase |
| 53. Maximum Subarray | Medium | 69.3% | TopicsArrayDivide and ConquerDynamic Programming |
| 42. Trapping Rain Water | Hard | 69.3% | TopicsArrayTwo PointersDynamic ProgrammingStackMonotonic Stack |
| 344. Reverse String | Easy | 59.7% | TopicsTwo PointersString |
| Department Top Three Salaries | Hard | 59.7% | TopicsDatabase |
| 647. Palindromic Substrings | Medium | 59.7% | TopicsTwo PointersStringDynamic Programming |
| 268. Missing Number | Easy | 59.7% | TopicsArrayHash TableMathBinary SearchBit ManipulationSorting |
| Minimum Size Subarray Sum | Medium | 59.7% | TopicsArrayBinary SearchSliding WindowPrefix Sum |
| 367. Valid Perfect Square | Easy | 59.7% | TopicsMathBinary Search |
| 9. Palindrome Number | Easy | 59.7% | TopicsMath |
| 49. Group Anagrams | Medium | 59.7% | TopicsArrayHash TableStringSorting |
