class Solution {
public:
    vector<int> printListReversingly(ListNode* head) {
        vector<int> res;
        head = reverse(head);
        while(head){
            res.push_back(head->val);
            head = head->next;
        }
        return res;
    }
    ListNode* reverse(ListNode *head){

        if(head==NULL||head->next==NULL){
            return head;
        }
        ListNode* temp = reverse(head->next);
        head->next->next = head;
        head->next = NULL;
        return temp;
    }
};