标签:init alt asp leetcode info 一个 load || src
1.层序遍历,一个队列存放节点,一个队列存放到当前节点的值。
2.递归
/**
* Definition for a binary tree node.
* public class TreeNode {
* int val;
* TreeNode left;
* TreeNode right;
* TreeNode(int x) { val = x; }
* }
*/
class Solution {
public boolean hasPathSum(TreeNode root, int sum) {
if(root == null){
return false;
}
if(root.left == null && root.right == null){
return sum == root.val;
}
return hasPathSum(root.left,sum-root.val) || hasPathSum(root.right,sum-root.val);
}
}
标签:init alt asp leetcode info 一个 load || src
原文地址:https://www.cnblogs.com/yu-jiawei/p/13260475.html