
examScore=int(input('점수: '))
minScore = 60
if examScore < minScore:
print('재시험')
else:
if examScore>=90:
print('A')
elif examScore>=80:
print('B')
elif examScore>=70:
print('C')
elif examScore>=60:
print('D')
# 점수: 59
# 재시험
# 점수: 65
# D
# 점수: 100
# A




