6

#include<bits/stdc++.h>
#include<algorithm>
using namespace std;

int main(){
int n,cnt = 0;
cin >> n;
for(int i = 0;i <= n/7;i){
int j =(n-7i)/4;
if((n-7i)%40 && (n-i-j)%30)
cnt;
}
cout << cnt;
return 0;
}