代码：

#include <iostream>
#include <cmath>
#include <cstring>
#include <string>
#include <iomanip>
using namespace std;

int main(){
    long long N;
    string DISH;
    cin >> N >> DISH;
    if (DISH=="AB"||DISH=="BA"||DISH=="BB") cout << N * 0.8 << endl;
    else if (DISH=="AC"||DISH=="CA"||DISH=="CC") cout << N * 0.7 << endl;
    else if (DISH=="BC"||DISH=="CB") cout << N * 0.6 << endl;
    else cout << N << endl;
    return 0;
}