Generally, most problems in Sleeping Cup require file I/O. Check the File IO section for filename details.

Sample code:

// P1. [System Test] Hello, World!
// code by:cirrationaler
// time:2025/08/21
#include <bits/stdc++.h>

using namespace std;

int main()
{
    // freopen("code.in", "r", stdin);
    freopen("test.in", "r", stdin);
    freopen("test.out", "w", stdout);
    printf("Hello, World!");
    return 0;
}