#include<bits/stdc++.h>
using namespace std;
long long a,n,m;
char x,y;
int main(){
	system("color 3F");
	srand(time(0));
	cout<<"请输入总题数："<<endl;
	cin>>n;
	cout<<"答题开始！"<<endl;
	for(int i=1;i<=n;i++){
		a=rand()%3;
		y='A'+char(a);
		cin>>x;
		if(x==y){
			m+=3;
			cout<<"正确！得分："<<m<<endl;
		} else{
			m-=2;
			cout<<"错误！得分："<<m<<" 正确答案是："<<y<<endl;
		}
	}
	cout<<"最后得分："<<m;
	return 0;
}

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