#if-elif-else문
'''
if 조건1:
    명령1
elif 조건2:
    명령2
else:
    명령N
'''
score = 50

if score >= 90:
    print('A')
elif score >= 80:
    print('B')
elif score >= 70:
    print('C')
else:
    print('재시험')

print('----문제1----')
age = 12

if age < 8:
    print('유치원생')
elif age < 14:
    print('초등학생')
elif age < 17:
    print('중학생')
elif age < 20:
    print('고등학생')
else:
    print('성인')