#include <iostream>
#include <vector>

using namespace std;

struct ListNode {
    int val;
    ListNode* next;
    // ListNode(int x) : val(x), next(NULL) {} // 
    ListNode(int x, ListNode* n = NULL) : val(x), next(n) {}
};

class Solution {
   public:
    vector<int> reversePrint(ListNode* head) {
        reverse(head);
        return (result);
    }

   private:
    vector<int> result;
    void reverse(ListNode* head) {
        if (head != nullptr) {
            if (head->next != nullptr) {
                reversePrint(head->next);
            }
            result.push_back(head->val);
        }
    };
};

int main(int, char**) {

    ListNode* head = new ListNode(1);
    head -> next = new ListNode(3);
    head -> next -> next = new ListNode(2);
    
    Solution s;
    std::cout << s.reversePrint(head)[0] << s.reversePrint(head)[1] << s.reversePrint(head)[2] << std::endl;
}