#40236: c++ answer
yp11251144@yphs.tp.edu.tw
(911-38曾湛)
hhhhhhhhhhhhhhhhhhhhhhhiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
#include <bits/stdc++.h>
using namespace std;
int main()
{
int n;
cin>>n;
cout<<(n/12)*50+(n%12)*5<<endl;
return 0;
}