112-Path-Sum.cpp

class Solution {
public:
    bool hasPathSum(TreeNode* root, int sum) {
        if (root == NULL) {
            return false;
        }
        if (root->left == NULL && root->right == NULL) {
            if (sum == root->val) {
                return true;
            } else {
                return false;
            }
        }
        if (hasPathSum(root->left, sum - root->val)) {
            return true;
        }
        if (hasPathSum(root->right, sum - root->val)) {
            return true;
        }
        return false;
        
    }
    
};