Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum.
Note
A leaf is a node with no children.
Example
Given the below binary tree and sum = 22,
1 |
5 |
return true, as there exist a root-to-leaf path 5->4->11->2 which sum is 22.
Code
1 |
public class { |
1 |
public boolean hasPathSum(TreeNode root, int sum) { |
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