#include<bits/stdc++.h>
using namespace std;
typedef long long  ll;
ll x;
char a,b;
int main()
{
        cin>>x>>a>>b;
	if(a>b)
	{
		swap(a,b);
	}
	if((a=='A'&&b=='B')||(a=='B'&&b=='B'))
	{
		cout<<(int)x*0.8;
	}
	else if((a=='A'&&b=='C')||(a=='C'&&b=='C'))
	{
		cout<<(int)x*0.7;
	}
	else if(a=='B'&&b=='C')
	{
		cout<<(int)x*0.6;
	}
	else
	{
		cout<<x;
	}
}