Roblox
58 problems
| Problem | Difficulty | Frequency ↓ | Topics |
|---|---|---|---|
| Candy Crush | Medium | 100% | TopicsArrayTwo PointersMatrixSimulation |
| 1434. Number of Ways to Wear Different Hats to Each Other | Hard | 96.2% | TopicsArrayDynamic ProgrammingBit ManipulationBitmaskBipartite GraphMatching (Graph)Perfect Matching |
| 767. Reorganize String | Medium | 88.5% | TopicsHash TableStringGreedySortingHeap (Priority Queue)Counting |
| 210. Course Schedule II | Medium | 82.2% | TopicsDepth-First SearchBreadth-First SearchGraph TheoryTopological Sort |
| 621. Task Scheduler | Medium | 80% | TopicsArrayHash TableGreedySortingHeap (Priority Queue)Counting |
| Text Justification | Hard | 80% | TopicsArrayStringSimulation |
| 849. Maximize Distance to Closest Person | Medium | 77.4% | TopicsArray |
| 3161. Block Placement Queries | Hard | 74.5% | TopicsArrayBinary SearchBinary Indexed TreeSegment TreeOrdered Set |
| Design Hit Counter | Medium | 71.2% | TopicsArrayBinary SearchDesignQueueData Stream |
| Design Search Autocomplete System | Hard | 71.2% | TopicsStringDepth-First SearchDesignTrieSortingHeap (Priority Queue)Data Stream |
| 48. Rotate Image | Medium | 67.1% | TopicsArrayMathMatrix |
| 1248. Count Number of Nice Subarrays | Medium | 67.1% | TopicsArrayHash TableMathSliding WindowPrefix Sum |
| 1282. Group the People Given the Group Size They Belong To | Medium | 67.1% | TopicsArrayHash TableGreedy |
| 1552. Magnetic Force Between Two Balls | Medium | 64.8% | TopicsArrayBinary SearchSorting |
| 811. Subdomain Visit Count | Medium | 64.8% | TopicsArrayHash TableStringCounting |
| 1290. Convert Binary Number in a Linked List to Integer | Easy | 64.8% | TopicsLinked ListMath |
| Students and Examinations | Easy | 64.8% | TopicsDatabase |
| 1297. Maximum Number of Occurrences of a Substring | Medium | 64.8% | TopicsHash TableStringSliding Window |
| Number of Trusted Contacts of a Customer | Medium | 64.8% | TopicsDatabase |
| 3071. Minimum Operations to Write the Letter Y on a Grid | Medium | 64.8% | TopicsArrayHash TableMatrixCounting |
| Logger Rate Limiter | Easy | 64.8% | TopicsHash TableDesignData Stream |
| 20. Valid Parentheses | Easy | 62.1% | TopicsStringStackBracket Sequences |
| 2817. Minimum Absolute Difference Between Elements With Constraint | Medium | 62.1% | TopicsArrayBinary SearchOrdered Set |
| 207. Course Schedule | Medium | 62.1% | TopicsDepth-First SearchBreadth-First SearchGraph TheoryTopological SortDirected Acyclic Graph |
| 2768. Number of Black Blocks | Medium | 62.1% | TopicsArrayHash TableEnumeration |
