DE Shaw
107 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| 1048. Longest String Chain | Medium | 46.9% | TopicsArrayHash TableTwo PointersStringDynamic ProgrammingSorting |
| 2104. Sum of Subarray Ranges | Medium | 46.9% | TopicsArrayStackMonotonic Stack |
| 2221. Find Triangular Sum of an Array | Medium | 46.9% | TopicsArrayMathSimulationCombinatoricsNumber Theory |
| 200. Number of Islands | Medium | 46.9% | TopicsArrayDepth-First SearchBreadth-First SearchUnion-FindMatrix |
| Longest Valid Parentheses | Hard | 46.9% | TopicsStringDynamic ProgrammingStackBracket Sequences |
| 146. LRU Cache | Medium | 46.9% | TopicsHash TableLinked ListDesignDoubly-Linked List |
| 994. Rotting Oranges | Medium | 46.9% | TopicsArrayBreadth-First SearchMatrix |
| 1000. Minimum Cost to Merge Stones | Hard | 46.9% | TopicsArrayDynamic ProgrammingPrefix Sum |
| 3. Longest Substring Without Repeating Characters | Medium | 46.9% | TopicsHash TableStringSliding Window |
| 74. Search a 2D Matrix | Medium | 46.9% | TopicsArrayBinary SearchMatrix |
| Maximal Square | Medium | 46.9% | TopicsArrayDynamic ProgrammingMatrix |
| 2062. Count Vowel Substrings of a String | Easy | 46.9% | TopicsHash TableString |
| Longest Consecutive Sequence | Medium | 37.9% | TopicsArrayHash TableUnion-Find |
| Basic Calculator II | Medium | 37.9% | TopicsMathStringStack |
| 2551. Put Marbles in Bags | Hard | 37.9% | TopicsArrayGreedySortingHeap (Priority Queue) |
| 752. Open the Lock | Medium | 37.9% | TopicsArrayHash TableStringBreadth-First SearchBidirectional Search |
| 2972. Count the Number of Incremovable Subarrays II | Hard | 37.9% | TopicsArrayTwo PointersBinary Search |
| 4Sum | Medium | 37.9% | TopicsArrayTwo PointersSorting |
| 1283. Find the Smallest Divisor Given a Threshold | Medium | 37.9% | TopicsArrayBinary Search |
| 34. Find First and Last Position of Element in Sorted Array | Medium | 37.9% | TopicsArrayBinary Search |
| Coin Change II | Medium | 37.9% | TopicsArrayDynamic ProgrammingKnapsack ProblemComplete Knapsack |
| Flatten Nested List Iterator | Medium | 37.9% | TopicsStackTreeDepth-First SearchDesignQueueIterator |
| Excel Sheet Column Title | Easy | 37.9% | TopicsMathString |
| 3281. Maximize Score of Numbers in Ranges | Medium | 37.9% | TopicsArrayBinary SearchGreedySorting |
| 1244. Design A Leaderboard | Medium | 37.9% | TopicsHash TableDesignSorting |
