LeetCode之226. Invert Binary Tree
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反转树的基本操作。
可是下面那句话是什么鬼啊,这么牛掰的人都会有这种遭遇,确实抚慰了一点最近面试被拒的忧伤.....
AC代码:
/** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * } */ public class Solution { public TreeNode invertTree(TreeNode root) { if(root==null) return null; TreeNode t=root.left; root.left=invertTree(root.right); root.right=invertTree(t); return root; } }