class Solution { public: /** * @param root TreeNode类 * @return int整型 */ int res; int dfs(TreeNode* root,int CurrentSum){ if (root == NULL) return CurrentSum; // 左侧直线 // 右侧直线 // 左侧直线+右侧直线-根节点值-2*currentsum int left = dfs(root->left, CurrentSum + root->val); int right = dfs(root->right, Curre...