2023.6.1 Problem: 144. Binary Tree Preorder Traversal - Githubissues

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2023.6.1 Problem: 144. Binary Tree Preorder Traversal #28

Closed umdreamer closed 1 year ago

umdreamer commented 1 year ago

Binary Tree Preorder Traversal Problem Link

Given the root of a binary tree, return the preorder traversal of its nodes' values.

Example 1:

Input: root = [1,null,2,3]
Output: [1,2,3]

Example 2:

Input: root = []
Output: []

Example 3:

Input: root = [1]
Output: [1]

Constraints:

The number of nodes in the tree is in the range [0, 100].
-100 <= Node.val <= 100

yeyuxq commented 1 year ago

bedauern commented 1 year ago

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wangshiqi7 commented 1 year ago

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cuixiao02 commented 1 year ago

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gusuning commented 1 year ago

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