leetcode-112 路径总和

Tree
留言

112. 路径总和

难度: 简单



  • 递归求解即可

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
/**
 * Definition for a binary tree node.
 * type TreeNode struct {
 *     Val int
 *     Left *TreeNode
 *     Right *TreeNode
 * }
 */
func hasPathSum(root *TreeNode, targetSum int) bool {

	if root == nil {
		return false
	}

	if root.Left == nil && root.Right == nil {
		return targetSum == root.Val
	}

	return hasPathSum(root.Left, targetSum-root.Val) || hasPathSum(root.Right, targetSum-root.Val)

}

文章目录