Cisco
77 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 141. Linked List Cycle | Easy | 55.7% | TopicsHash TableLinked ListTwo PointersFloyd's Cycle Finding Algorithm |
| 2. Add Two Numbers | Medium | 51.1% | TopicsLinked ListMathRecursion |
| 3Sum | Medium | 51.1% | TopicsArrayTwo PointersSorting |
| Max Points on a Line | Hard | 51.1% | TopicsArrayHash TableMathGeometryEuclidean AlgorithmGreatest Common Divisor |
| 202. Happy Number | Easy | 51.1% | TopicsHash TableMathTwo PointersFloyd's Cycle Finding Algorithm |
| Decode String | Medium | 51.1% | TopicsStringStackRecursion |
| Remove Duplicates from Sorted Array | Easy | 51.1% | TopicsArrayTwo Pointers |
| 56. Merge Intervals | Medium | 45.3% | TopicsArraySortingQuicksort |
| 88. Merge Sorted Array | Easy | 45.3% | TopicsArrayTwo PointersSorting |
| 2016. Maximum Difference Between Increasing Elements | Easy | 45.3% | TopicsArray |
| 121. Best Time to Buy and Sell Stock | Easy | 45.3% | TopicsArrayDynamic Programming |
| 200. Number of Islands | Medium | 45.3% | TopicsArrayDepth-First SearchBreadth-First SearchUnion-FindMatrix |
| 206. Reverse Linked List | Easy | 45.3% | TopicsLinked ListRecursion |
| Insert Delete GetRandom O(1) | Medium | 45.3% | TopicsArrayHash TableMathDesignRandomized |
| 49. Group Anagrams | Medium | 45.3% | TopicsArrayHash TableStringSorting |
| 125. Valid Palindrome | Easy | 45.3% | TopicsTwo PointersString |
| Meeting Rooms II | Medium | 45.3% | TopicsArrayTwo PointersGreedySortingHeap (Priority Queue)Prefix Sum |
| 25. Reverse Nodes in k-Group | Hard | 45.3% | TopicsLinked ListRecursion |
| Predict the Winner | Medium | 45.3% | TopicsArrayMathDynamic ProgrammingRecursionMinimaxGame TheoryZero-Sum Game |
| Lowest Common Ancestor of a Binary Tree | Medium | 45.3% | TopicsTreeDepth-First SearchBinary TreeBinary LiftingLowest Common Ancestor |
| 79. Word Search | Medium | 45.3% | TopicsArrayStringBacktrackingDepth-First SearchMatrix |
| 283. Move Zeroes | Easy | 37.1% | TopicsArrayTwo Pointers |
| Reverse Words in a String | Medium | 37.1% | TopicsTwo PointersString |
| Longest Consecutive Sequence | Medium | 37.1% | TopicsArrayHash TableUnion-Find |
| 17. Letter Combinations of a Phone Number | Medium | 37.1% | TopicsHash TableStringBacktracking |
