计算邮费

#include<bits/stdc++.h>
using namespace std;
int a,ans=8;char s;
int main()
{
cin>>a>>s;
if(a>1000)
{
a=a-1000;
ans=ans+(a/500)*4;
if(a%500!=0)
ans=ans+4;
}
if(s=='y')
ans=ans+5;
cout<<ans;
return 0;
}