Same Tree
给两个树的node, 问是不是两个树一模一样.
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 |
/** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * } */ public class Solution { public boolean isSameTree(TreeNode p, TreeNode q) { if(p == null && q == null) return true; if(p == null ^ q == null) return false; if(p.val != q.val) return false; return isSameTree(p.left,q.left) && isSameTree(p.right,q.right); } } |