本文是在学习中的总结,欢迎转载但请注明出处:http://blog.csdn.net/pistolove/article/details/42876769
Given a binary tree, return the postorder traversal of its nodes‘ values.
For example:
Given binary tree {1,#,2,3}
,
1
2
/
3
return [3,2,1]
.
Note: Recursive solution is trivial, could you do it iteratively?
思路:
(1)题意为后序遍历二叉树。遍历顺序为左—>右—>根。
(2)考虑到用递归比较简单,本文使用递归的思想进行解决,由于比较简单这里不累赘,详见下方代码。
(3)希望本文对你有所帮助。
算法代码实现如下:
/** * @author liqq */ public List<Integer> PostorderTraversal(TreeNode root) { List<Integer> result = new LinkedList<Integer>(); if (root != null) { Post_order(result, root.left); Post_order(result, root.right); result.add(root.val); } return result; } private void Post_order(List<Integer> result, TreeNode curr) { if (curr != null) { Post_order(result, curr.left); Post_order(result, curr.right); result.add(curr.val); } }
Binary Tree Postorder Traversal
原文地址:http://blog.csdn.net/pistolove/article/details/42876769