Practice problems across 75+ categories
Practice coding problems across all companies and topics • 3600 problems | 879 Easy | 1856 Medium | 842 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 226 | Boats to Save People | Medium | ArrayTwo PointersGreedy |
| 227 | Bold Words in String | Medium | ArrayHash TableString |
| 228 | Bomb Enemy | Medium | ArrayDynamic ProgrammingMatrix |
| 229 | Booking Concert Tickets in Groups | Hard | Binary SearchDesignBinary Indexed Tree |
| 230 | Books with NULL Ratings | Easy | Database |
| 231 | Boundary of Binary Tree | Medium | TreeDepth-First SearchBinary Tree |
| 232 | Brace Expansion | Unknown | StringBacktrackingStack |
| 233 | Brace Expansion II | Hard | Hash TableStringBacktracking |
| 234 | Break a Palindrome | Medium | StringGreedy |
| 235 | Brick Wall | Medium | ArrayHash Table |
| 236 | Bricks Falling When Hit | Hard | ArrayUnion FindMatrix |
| 237 | Brightest Position on Street | Medium | ArraySortingPrefix Sum |
| 238 | Broken Calculator | Medium | MathGreedy |
| 239 | Buddy Strings | Easy | Hash TableString |
| 240 | Build a Matrix With Conditions | Hard | ArrayGraphTopological Sort |
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