[C++][조건/선택 실행 구조]1068

[1068]

#include <bits/stdc++.h>
using namespace std;
int main(){
	int a;
	cin >> a;
	switch(a/10){
		case 10 :
		case 9 :
			cout<<"A";
			break;
		case 8 :
		case 7 :
			cout<<"B";
			break;
		case 6 :
		case 5 :
		case 4 :
			cout<<"C";
			break;
		default :
			cout<<"D";	
	}
	
	return 0;
}