Affirm
10 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| Insert Delete GetRandom O(1) | Medium | 100% | TopicsArrayHash TableMathDesignRandomized |
| 3076. Shortest Uncommon Substring in an Array | Medium | 87.5% | TopicsArrayHash TableStringTrie |
| Parse Lisp Expression | Hard | 78.2% | TopicsHash TableStringStackRecursion |
| Insert Delete GetRandom O(1) - Duplicates allowed | Hard | 69.3% | TopicsArrayHash TableMathDesignRandomized |
| Design Hit Counter | Medium | 65% | TopicsArrayBinary SearchDesignQueueData Stream |
| 49. Group Anagrams | Medium | 59.5% | TopicsArrayHash TableStringSorting |
| 242. Valid Anagram | Easy | 59.5% | TopicsHash TableStringSorting |
| 443. String Compression | Medium | 51.8% | TopicsTwo PointersString |
| 322. Coin Change | Medium | 51.8% | TopicsArrayDynamic ProgrammingBreadth-First SearchKnapsack ProblemComplete Knapsack |
| 465. Optimal Account Balancing | Hard | 51.8% | TopicsArrayDynamic ProgrammingBacktrackingBit ManipulationBitmask |
