<reponame>fishhello/learn
age = input("请输入您的年龄：")
int_age = int(age)
if(int_age < 21):
    print("litle young")
else:
    print("old!!")

age = input("请输入您的年龄：")
int_age = int(age)
if(int_age < 21):
    print("litle young")
else:
    print("old!!")