#include <cstdio>
#include <queue>
using namespace std;



int a[6000100];

int main()
{
    freopen ("ssm.in","r", stdin);
    freopen ("ssm.out", "w", stdout);

    int n;
    scanf("%d", &n);

    for(int i = 1; i<=n; ++i)
        scanf("%d", &a[i]);

    printf("0\n");

    return 0;
}