Practice problems across 75+ categories
Practice problems frequently asked at Array • 1947 problems | 398 Easy | 1049 Medium | 497 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 1861 | The Number of Weak Characters in the Game | Medium | ArrayStackGreedy |
| 1862 | The Score of Students Solving Math Expression | Hard | ArrayHash TableMath |
| 1863 | The Skyline Problem | Hard | ArrayDivide and ConquerBinary Indexed Tree |
| 1864 | The Time When the Network Becomes Idle | Medium | ArrayBreadth-First SearchGraph |
| 1865 | The Two Sneaky Numbers of Digitville | Easy | ArrayHash TableMath |
| 1866 | The Wording Game | Hard | ArrayMathTwo Pointers |
| 1867 | Third Maximum Number | Easy | ArraySorting |
| 1868 | Three Consecutive Odds | Easy | Array |
| 1869 | Three Equal Parts | Hard | ArrayMath |
| 1870 | Time Needed to Buy Tickets | Easy | ArrayQueueSimulation |
| 1871 | Time Taken to Cross the Door | Hard | ArrayQueueSimulation |
| 1872 | Time to Cross a Bridge | Hard | ArrayHeap (Priority Queue)Simulation |
| 1873 | Toeplitz Matrix | Easy | ArrayMatrix |
| 1874 | Top K Frequent Elements | Medium | ArrayHash TableDivide and Conquer |
| 1875 | Top K Frequent Words | Medium | ArrayHash TableString |
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