Practice problems across 75+ categories
Practice coding problems across all companies and topics • 3600 problems | 879 Easy | 1856 Medium | 842 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 196 | Binary String With Substrings Representing 1 To N | Medium | Hash TableStringBit Manipulation |
| 197 | Binary Subarrays With Sum | Medium | ArrayHash TableSliding Window |
| 198 | Binary Tree Cameras | Hard | Dynamic ProgrammingTreeDepth-First Search |
| 199 | Binary Tree Coloring Game | Medium | TreeDepth-First SearchBinary Tree |
| 200 | Binary Tree Inorder Traversal | Easy | StackTreeDepth-First Search |
| 201 | Binary Tree Level Order Traversal | Medium | TreeBreadth-First SearchBinary Tree |
| 202 | Binary Tree Level Order Traversal II | Medium | TreeBreadth-First SearchBinary Tree |
| 203 | Binary Tree Longest Consecutive Sequence | Medium | TreeDepth-First SearchBinary Tree |
| 204 | Binary Tree Longest Consecutive Sequence II | Medium | TreeDepth-First SearchBinary Tree |
| 205 | Binary Tree Maximum Path Sum | Hard | Dynamic ProgrammingTreeDepth-First Search |
| 206 | Binary Tree Nodes | Medium | Database |
| 207 | Binary Tree Paths | Easy | StringBacktrackingTree |
| 208 | Binary Tree Postorder Traversal | Easy | StackTreeDepth-First Search |
| 209 | Binary Tree Preorder Traversal | Easy | StackTreeDepth-First Search |
| 210 | Binary Tree Pruning | Medium | TreeDepth-First SearchBinary Tree |
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