2324 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 146. LRU Cache | Medium | 56.8% | TopicsHash TableLinked ListDesignDoubly-Linked List |
| 4Sum | Medium | 56.5% | TopicsArrayTwo PointersSorting |
| 162. Find Peak Element | Medium | 56.5% | TopicsArrayBinary Search |
| Rotate Array | Medium | 56.4% | TopicsArrayMathTwo Pointers |
| 66. Plus One | Easy | 56.2% | TopicsArrayMath |
| Max Consecutive Ones | Easy | 56.2% | TopicsArray |
| 48. Rotate Image | Medium | 56.1% | TopicsArrayMathMatrix |
| 28. Find the Index of the First Occurrence in a String | Easy | 55.8% | TopicsTwo PointersStringString MatchingZ AlgorithmKnuth–Morris–Pratt AlgorithmBoyer–Moore String-Search Algorithm |
| 55. Jump Game | Medium | 55.8% | TopicsArrayDynamic ProgrammingGreedy |
| 35. Search Insert Position | Easy | 55.2% | TopicsArrayBinary Search |
| Sliding Window Maximum | Hard | 55.2% | TopicsArrayQueueSliding WindowHeap (Priority Queue)Monotonic QueueRange Minimum/Maximum Query |
| 215. Kth Largest Element in an Array | Medium | 54.9% | TopicsArrayDivide and ConquerSortingHeap (Priority Queue)Quickselect |
| 202. Happy Number | Easy | 54.8% | TopicsHash TableMathTwo PointersFloyd's Cycle Finding Algorithm |
| 217. Contains Duplicate | Easy | 54.8% | TopicsArrayHash TableSorting |
| 6. Zigzag Conversion | Medium | 54.2% | TopicsString |
| Pow(x, n) | Medium | 54.2% | TopicsMathRecursion |
| 424. Longest Repeating Character Replacement | Medium | 53.9% | TopicsHash TableStringSliding Window |
| 1944. Number of Visible People in a Queue | Hard | 53.9% | TopicsArrayStackMonotonic Stack |
| 75. Sort Colors | Medium | 53.5% | TopicsArrayTwo PointersSortingQuicksortBubble Sort |
| 540. Single Element in a Sorted Array | Medium | 53.4% | TopicsArrayBinary Search |
| 67. Add Binary | Easy | 53.2% | TopicsMathStringBit ManipulationSimulation |
| 238. Product of Array Except Self | Medium | 53% | TopicsArrayPrefix Sum |
| Russian Doll Envelopes | Hard | 52.7% | TopicsArrayBinary SearchDynamic ProgrammingSortingLongest Increasing Subsequence |
| 34. Find First and Last Position of Element in Sorted Array | Medium | 52.5% | TopicsArrayBinary Search |
| 231. Power of Two | Easy | 52.5% | TopicsMathBit ManipulationRecursion |
