====== 시험 성적 ======

===== 풀이 =====
  * 보통 조건문을 처음 배울 때 풀어보는 기초 문제.

===== 코드 =====
<dkpr py>
"""Solution code for "BOJ 9498. 시험 성적".

- Problem link: https://www.acmicpc.net/problem/9498
- Solution link: http://www.teferi.net/ps/problems/boj/9498
"""


def main():
    score = int(input())
    if score >= 90:
        print('A')
    elif score >= 80:
        print('B')
    elif score >= 70:
        print('C')
    elif score >= 60:
        print('D')
    else:
        print('F')


if __name__ == '__main__':
    main()
</dkpr>

{{tag>BOJ ps:problems:boj:브론즈_4}}