#include <bits/stdc++.h>
#define ll long long
using namespace std;

int t;

class ListNode {
public:
    int val;
    ListNode *next;
};

unordered_map <ListNode*, int> reached;

int main() {
    cin.tie(0);
    ios :: sync_with_stdio(0);

    cin >> t;
    for (int query = 1; query <= t; ++query) {

    }

    ListNode *a = new ListNode;
    a->val = 1;
    a->next = new ListNode;

    reached[a] = 1;

    return 0;
}