Practice problems across 75+ categories
Practice problems frequently asked at Microsoft • 3344 problems | 831 Easy | 1747 Medium | 746 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 181 | Bitwise OR of All Subsequence Sums | Medium | ArrayMathBit Manipulation |
| 182 | Bitwise ORs of Subarrays | Medium | ArrayDynamic ProgrammingBit Manipulation |
| 183 | Bitwise User Permissions Analysis | Medium | Database |
| 184 | Bitwise XOR of All Pairings | Medium | ArrayBit ManipulationBrainteaser |
| 185 | Block Placement Queries | Hard | ArrayBinary SearchBinary Indexed Tree |
| 186 | Boats to Save People | Medium | ArrayTwo PointersGreedy |
| 187 | Bold Words in String | Medium | ArrayHash TableString |
| 188 | Books with NULL Ratings | Easy | Database |
| 189 | Boundary of Binary Tree | Medium | TreeDepth-First SearchBinary Tree |
| 190 | Brace Expansion | Unknown | StringBacktrackingStack |
| 191 | Break a Palindrome | Medium | StringGreedy |
| 192 | Brick Wall | Medium | ArrayHash Table |
| 193 | Brightest Position on Street | Medium | ArraySortingPrefix Sum |
| 194 | Broken Calculator | Medium | MathGreedy |
| 195 | Buddy Strings | Easy | Hash TableString |
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