class Solution {
public:
    TreeNode* ret;
    TreeNode* search(TreeNode* clo, int target) {
        if (clo == nullptr) return nullptr;
        if (clo->val == target) ret = clo;
        search(clo->left, target);
        search(clo->right, target);
        return nullptr;
    }
    TreeNode* getTargetCopy(TreeNode* original, TreeNode* cloned, TreeNode* target) {
        int t = target->val;
        search(cloned, t);
        return ret;
    }
};