#include<iostream> #include<iomanip> using namespace std; int main() { char n; int m; cin>>n>>m; switch(n){ case 'P': cout<<m/10*7; break; case 'G': cout<<m/10*8; break; case 'S': cout<<m/10*9; break; default: cout<<m/10*9.5; break; } return 0; }