Leetcode's topic on tree level traversal - Code World

Leetcode's topic on tree level traversal

Mobile 2023-04-08 21:52:20 views: null

In the topic about tree traversal in Leetcode, the common tree traversal methods (pre, middle, and post order traversal) have been explained in detail.

Stacks are used for front, middle and back order traversal , and queues are used for hierarchical traversal

This article mainly discusses: Hierarchical traversal of trees

102. Level order traversal of binary tree

107. Level Order Traversal of Binary Tree II

429. Level Order Traversal of N-ary Trees

The front-middle-order traversal uses DFS (depth-first search) , while the hierarchical traversal uses BFS (breadth-first traversal)

DFS needs to use stack
BFS needs to use queue <

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Origin blog.csdn.net/wangcheeng/article/details/115890018

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