#include<bits/stdc++.h>
using namespace std;
int main(){
    int n,a,b;
    cin>>n;
    if(n>=10){
        a=25*3*5; 
    }else if(n>=7){
        a=15*3*5;
    }else if(n>=3){
        a=5*3*5;  
    }
    if(a%120==0){
        b=a/120;
    }else{
        b=a/120+1;
    }
    cout<<b<<endl;
    return 0;
}
/**************************************************************
	Problem: 1310
	User: panjinyan
	Language: C++
	Result: Accepted
	Time:20 ms
	Memory:2072 kb
****************************************************************/