Practice problems across 75+ categories
Practice problems frequently asked at Facebook • 275 problems | 55 Easy | 175 Medium | 42 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 106 | Increasing Triplet Subsequence | Medium | ArrayGreedy |
| 107 | Inorder Successor in BST II | Medium | TreeBinary Search TreeBinary Tree |
| 108 | Insert into a Sorted Circular Linked List | Medium | Linked List |
| 109 | Intersection of Three Sorted Arrays | Easy | ArrayHash TableBinary Search |
| 110 | Intersection of Two Arrays II | Easy | ArrayHash TableTwo Pointers |
| 111 | Is Graph Bipartite? | Medium | Depth-First SearchBreadth-First SearchUnion Find |
| 112 | K Empty Slots | Hard | ArrayBinary Indexed TreeSegment Tree |
| 113 | Kill Process | Medium | ArrayHash TableTree |
| 114 | Knight Dialer | Medium | Dynamic Programming |
| 115 | Kth Largest Element in a Stream | Easy | TreeDesignBinary Search Tree |
| 116 | Kth Largest Element in an Array | Medium | ArrayDivide and ConquerSorting |
| 117 | Kth Missing Positive Number | Easy | ArrayBinary Search |
| 118 | Largest Number At Least Twice of Others | Easy | ArraySorting |
| 119 | Last Moment Before All Ants Fall Out of a Plank | Medium | ArrayBrainteaserSimulation |
| 120 | Leaf-Similar Trees | Easy | TreeDepth-First SearchBinary Tree |
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