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