#include <iostream> #include <cstdio> using namespace std; int main() { int age,cnt=0; cin>>age; if (age>10) cnt=25; else if (age<=10 and age>=7) cnt=15; else cnt=5; cnt*=15; if (cnt%120==0) cout<<cnt/120; else cout<<(int)(cnt/120+1); return 0; }