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145. Binary Tree Postorder Traversal.go
145. Binary Tree Postorder Traversal_test.go
README.md

README.md

145. Binary Tree Postorder Traversal

题目

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

Example :

Input: [1,null,2,3]
   1
    \
     2
    /
   3

Output: [3,2,1]

Follow up: Recursive solution is trivial, could you do it iteratively?

题目大意

后根遍历一颗树。

解题思路

递归的实现方法,见代码。

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