#include<iostream> using namespace std; int main(){ int n,a,b; cin>>n; if(n>10){ a=75*5; } else if(n<=10&&n>=7){ a=45*5; } else if(n<=6&&n>=3){ a=15*5; } if(a%120==0){ b=a/120; } else{ b=a/120+1; } cout<<b; return 0; }