CHAM TRAC NGHIEM

#include<iostream>
#include<cmath>
#include<string>
#include <iomanip>
using namespace std;
int main() {
    int t;
    cin >> t;
    char de101[]="ABBADCCABDCCABD";
    char de102[]="ACCABCDDBBCDDBB";
    while(t--){
        int made,caudung=0,i;
        cin >> made;
        char ketqua[20];
        for(i = 0; i<15; i++){
            cin >> ketqua[i];
        }
        if(made==101){
            for(i = 0; i<15; i++){
                if(ketqua[i]==de101[i]){
                    caudung++;
                }
            }
        }else{
            for(i = 0; i<15; i++){
                if(ketqua[i]==de102[i]){
                    caudung++;
                }
            }
        }
        double diemthi = (double)10/15*caudung;
        cout << fixed << setprecision(2) << diemthi << endl;
    }
}