#include <bits/stdc++.h>

#define rep(i,n) for(int i=0;i<(n);i++)

using namespace std;

int main(){
	int n; scanf("%d",&n);
	int a[]={-1,7,8,9,4,5,6,1,2,3,0};
	printf("%d\n",a[n]);
	return 0;
}