문제
풀이
#include <iostream>
using namespace std;
void solve(void) {
int score; cin >> score;
if (score >= 90) cout << 'A';
else if (score >= 80) cout << 'B';
else if (score >= 70) cout << 'C';
else if (score >= 60) cout << 'D';
else cout << 'F';
}
int main(void) {
ios::sync_with_stdio(false);
cin.tie(nullptr);
solve();
return 0;
}