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path-sum.cpp
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28 lines (26 loc) · 824 Bytes
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/**
* Definition for a binary tree node.
* struct TreeNode {
* int val;
* TreeNode *left;
* TreeNode *right;
* TreeNode() : val(0), left(nullptr), right(nullptr) {}
* TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}
* TreeNode(int x, TreeNode *left, TreeNode *right) : val(x), left(left), right(right) {}
* };
*/
class Solution {
public:
bool hasPathSum(TreeNode* root, int targetSum) {
if(root==NULL){
return false;
}
if(root->left==NULL&&root->right==NULL){
if(targetSum-root->val==0){
return true;
}
}
return hasPathSum(root->left,targetSum-root->val)||hasPathSum(root->right,targetSum-root->val);
}
};
// https://leetcode.com/submissions/detail/809847376/