/// 7. useful skills

#include<bits/stdc++.h>
#define int long long // This is very useful on competitive programming
using namespace std;

signed main(){

    int n;
    cin >> n;
    while(n--){
        // this loop will repeat (n) times
        // WARNING: The value of (n) will be changed during the loop is running
    }

    while(cin >> n){
        // this loop will repeatly ask you to input value of (n)
        // until you insert the EOF
    }

    while(cin >> n){
        // this loop will always running until you input value 0
    }

    /// ** Don't forget to add ';' at the end of the statement **
}