3 line C++ solution, but why the runtime is not so fast?


  • 0
    D
    class Solution {
    public:
    bool hasPathSum(TreeNode* root, int sum) {
          if (root == NULL) return false;
          if (root->left == NULL && root->right ==NULL) return root->val == sum;
          return hasPathSum(root->left, sum - root->val) || hasPathSum(root->right, sum - root->val);
    }
    
    };

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