EPAM Systems
52 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 1. Two Sum | Easy | 100% | TopicsArrayHash Table |
| 283. Move Zeroes | Easy | 95.1% | TopicsArrayTwo Pointers |
| 3. Longest Substring Without Repeating Characters | Medium | 93.2% | TopicsHash TableStringSliding Window |
| 2033. Minimum Operations to Make a Uni-Value Grid | Medium | 86.3% | TopicsArrayMathSortingMatrix |
| 49. Group Anagrams | Medium | 83.5% | TopicsArrayHash TableStringSorting |
| 20. Valid Parentheses | Easy | 80.3% | TopicsStringStackBracket Sequences |
| 88. Merge Sorted Array | Easy | 80.3% | TopicsArrayTwo PointersSorting |
| 5. Longest Palindromic Substring | Medium | 76.7% | TopicsTwo PointersStringDynamic ProgrammingManacher |
| 121. Best Time to Buy and Sell Stock | Easy | 76.7% | TopicsArrayDynamic Programming |
| 14. Longest Common Prefix | Easy | 76.7% | TopicsArrayStringTrie |
| 242. Valid Anagram | Easy | 72.3% | TopicsHash TableStringSorting |
| Rotate Array | Medium | 72.3% | TopicsArrayMathTwo Pointers |
| 345. Reverse Vowels of a String | Easy | 72.3% | TopicsTwo PointersString |
| 91. Decode Ways | Medium | 72.3% | TopicsStringDynamic Programming |
| 387. First Unique Character in a String | Easy | 67% | TopicsHash TableStringQueueCounting |
| 1004. Max Consecutive Ones III | Medium | 67% | TopicsArrayBinary SearchSliding WindowPrefix Sum |
| 3Sum | Medium | 60.2% | TopicsArrayTwo PointersSorting |
| 42. Trapping Rain Water | Hard | 60.2% | TopicsArrayTwo PointersDynamic ProgrammingStackMonotonic Stack |
| 7. Reverse Integer | Medium | 60.2% | TopicsMath |
| 443. String Compression | Medium | 60.2% | TopicsTwo PointersString |
| 344. Reverse String | Easy | 60.2% | TopicsTwo PointersString |
| 56. Merge Intervals | Medium | 60.2% | TopicsArraySortingQuicksort |
| 22. Generate Parentheses | Medium | 60.2% | TopicsStringDynamic ProgrammingBacktrackingBracket Sequences |
| 13. Roman to Integer | Easy | 60.2% | TopicsHash TableMathString |
| 347. Top K Frequent Elements | Medium | 60.2% | TopicsArrayHash TableDivide and ConquerSortingHeap (Priority Queue)Bucket SortCountingQuickselect |
