Cisco
77 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 2603. Collect Coins in a Tree | Hard | 100% | TopicsArrayTreeGraph TheoryTopological Sort |
| 5. Longest Palindromic Substring | Medium | 91.2% | TopicsTwo PointersStringDynamic ProgrammingManacher |
| 198. House Robber | Medium | 85.2% | TopicsArrayDynamic Programming |
| 212. Word Search II | Hard | 84.2% | TopicsArrayStringBacktrackingTrieMatrix |
| 3. Longest Substring Without Repeating Characters | Medium | 71.9% | TopicsHash TableStringSliding Window |
| 3508. Implement Router | Medium | 71.9% | TopicsArrayHash TableBinary SearchDesignQueueOrdered Set |
| 3607. Power Grid Maintenance | Medium | 71.9% | TopicsArrayHash TableDepth-First SearchBreadth-First SearchUnion-FindGraph TheoryHeap (Priority Queue)Ordered Set |
| 48. Rotate Image | Medium | 70% | TopicsArrayMathMatrix |
| 1380. Lucky Numbers in a Matrix | Easy | 70% | TopicsArrayMatrix |
| 54. Spiral Matrix | Medium | 67.8% | TopicsArrayMatrixSimulation |
| 146. LRU Cache | Medium | 67.8% | TopicsHash TableLinked ListDesignDoubly-Linked List |
| 2081. Sum of k-Mirror Numbers | Hard | 67.8% | TopicsMathEnumeration |
| 2448. Minimum Cost to Make Array Equal | Hard | 67.8% | TopicsArrayBinary SearchGreedySortingPrefix Sum |
| 2047. Number of Valid Words in a Sentence | Easy | 65.4% | TopicsString |
| Number of Equal Count Substrings | Medium | 65.4% | TopicsHash TableStringSliding WindowCounting |
| 3047. Find the Largest Area of Square Inside Two Rectangles | Medium | 65.4% | TopicsArrayMathGeometry |
| 1784. Check if Binary String Has at Most One Segment of Ones | Easy | 65.4% | TopicsString |
| 3648. Minimum Sensors to Cover Grid | Medium | 65.4% | TopicsMath |
| 53. Maximum Subarray | Medium | 62.6% | TopicsArrayDivide and ConquerDynamic Programming |
| 412. Fizz Buzz | Easy | 62.6% | TopicsMathStringSimulation |
| Diagonal Traverse | Medium | 62.6% | TopicsArrayMatrixSimulation |
| 72. Edit Distance | Medium | 59.5% | TopicsStringDynamic Programming |
| 1443. Minimum Time to Collect All Apples in a Tree | Medium | 59.5% | TopicsHash TableTreeDepth-First SearchBreadth-First SearchDP on Trees |
| 1. Two Sum | Easy | 55.7% | TopicsArrayHash Table |
| 20. Valid Parentheses | Easy | 55.7% | TopicsStringStackBracket Sequences |
