2023.6.2 Problem: 145. Binary Tree Postorder Traversal - Githubissues

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2023.6.2 Problem: 145. Binary Tree Postorder Traversal #29

Closed umdreamer closed 1 year ago

umdreamer commented 1 year ago

Binary Tree Postorder Traversal Problem Link

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

Example 1:

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

Example 2:

Input: root = []
Output: []

Example 3:

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

Constraints:

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

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