Practice problems across 75+ categories
Practice problems frequently asked at Prefix Sum • 208 problems | 18 Easy | 128 Medium | 61 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 136 | Minimum Penalty for a Shop | Medium | StringPrefix Sum |
| 137 | Minimum Positive Sum Subarray | Unknown | ArraySliding WindowPrefix Sum |
| 138 | Minimum Relative Loss After Buying Chocolates | Hard | ArrayBinary SearchSorting |
| 139 | Minimum Size Subarray in Infinite Array | Medium | ArrayHash TableSliding Window |
| 140 | Minimum Size Subarray Sum | Medium | ArrayBinary SearchSliding Window |
| 141 | Minimum Space Wasted From Packaging | Hard | ArrayBinary SearchSorting |
| 142 | Minimum Time to Visit All Houses | Medium | ArrayPrefix Sum |
| 143 | Minimum Value to Get Positive Step by Step Sum | Easy | ArrayPrefix Sum |
| 144 | Minimum White Tiles After Covering With Carpets | Hard | StringDynamic ProgrammingPrefix Sum |
| 145 | Movement of Robots | Medium | ArrayBrainteaserSorting |
| 146 | My Calendar II | Medium | ArrayBinary SearchDesign |
| 147 | My Calendar III | Hard | Binary SearchDesignSegment Tree |
| 148 | Number of Beautiful Partitions | Hard | StringDynamic ProgrammingPrefix Sum |
| 149 | Number of Divisible Substrings | Medium | Hash TableStringCounting |
| 150 | Number of Flowers in Full Bloom | Hard | ArrayHash TableBinary Search |
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