Practice problems across 75+ categories
Practice problems frequently asked at Facebook • 275 problems | 55 Easy | 175 Medium | 42 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 241 | Sort the Matrix Diagonally | Medium | ArraySortingMatrix |
| 242 | Split Array into Fibonacci Sequence | Medium | StringBacktracking |
| 243 | Strange Printer II | Hard | ArrayGraphTopological Sort |
| 244 | String to Integer (atoi) | Medium | String |
| 245 | String Transforms Into Another String | Hard | Hash TableStringGraph |
| 246 | Subarray Sum Equals K | Medium | ArrayHash TablePrefix Sum |
| 247 | Sum of Even Numbers After Queries | Medium | ArraySimulation |
| 248 | Sum of Left Leaves | Easy | TreeDepth-First SearchBreadth-First Search |
| 249 | Sum of Nodes with Even-Valued Grandparent | Medium | TreeDepth-First SearchBreadth-First Search |
| 250 | Super Palindromes | Hard | MathStringEnumeration |
| 251 | Super Ugly Number | Medium | ArrayMathDynamic Programming |
| 252 | Swim in Rising Water | Hard | ArrayBinary SearchDepth-First Search |
| 253 | Tallest Billboard | Hard | ArrayDynamic Programming |
| 254 | Task Scheduler | Medium | ArrayHash TableGreedy |
| 255 | The Maze II | Medium | ArrayDepth-First SearchBreadth-First Search |
Powerful online tools to boost your productivity
Coding Ground For Developers
Code, Edit, Run and ShareIgnite your coding potential on Coding Ground - an immersive online platform for hands-on learning, collaboration, and skill development.
