练习：
如果账号密码匹配，返回success，不匹配返回fail。
account="nautilus"
password=123456
print("please input your user name:")
user_account =str(input())
print("please input your password")
user_password =int(input())
if user_account == account and user_password==password:
print("success")
else:
print("fail")
