score = int(input("점수를 입력하시오 : "))

if score>=90 :
     if score>=95:
          print("A+")
     elif score>=90:
          print("A0")
elif score>=80 :
     if score>=85:
          print("B+")
     elif score>=80:
          print("B0")
elif score >= 70 :
     if score>=75:
          print("C+")
     elif score>=70:
          print("C0")
elif score >= 60 :
     if score>=75:
          print("D+")
     elif score>=70:
          print("D0")
else :
     print('F')



print("학점 입니다.")
