Practice problems across 75+ categories
Practice problems frequently asked at Meta • 2900 problems | 652 Easy | 1528 Medium | 703 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 151 | Boundary of Binary Tree | Medium | TreeDepth-First SearchBinary Tree |
| 152 | Break a Palindrome | Medium | StringGreedy |
| 153 | Brick Wall | Medium | ArrayHash Table |
| 154 | Brightest Position on Street | Medium | ArraySortingPrefix Sum |
| 155 | Broken Calculator | Medium | MathGreedy |
| 156 | Buddy Strings | Easy | Hash TableString |
| 157 | Build a Matrix With Conditions | Hard | ArrayGraphTopological Sort |
| 158 | Build an Array With Stack Operations | Medium | ArrayStackSimulation |
| 159 | Build Array from Permutation | Easy | ArraySimulation |
| 160 | Build Array Where You Can Find The Maximum Exactly K Comparisons | Hard | Dynamic ProgrammingPrefix Sum |
| 161 | Build Binary Expression Tree From Infix Expression | Hard | StringStackTree |
| 162 | Build the Equation | Hard | Database |
| 163 | Building Boxes | Hard | MathBinary SearchGreedy |
| 164 | Building H2O | Medium | Concurrency |
| 165 | Buildings With an Ocean View | Medium | ArrayStackMonotonic Stack |
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