# username = input('user:')
# password = input('Passward:')
# if username == 'admin' and password == '123':
# print('login')
# else:
# print('Error.')
# password = input('Password:')
# A = 'QWERTYUIOPASDFGHJKLZXCVBNM'
# B = 'zxcvbnmasdfghjklqwertyuiop'
# C = '1234567890'
# for i in passwoed:
# if i in A and i in B and i in C:
# pass
# else:
# print('必须含有大写小写数字')
#分段函数↓
# x = float(input('x:'))
# if x > 1:
# f = 3 * x - 5
# elif x >= -1 and x <= 1 :
# f = x + 2
# else:
# f = 5 * x + 3
# print('f= %f'%f)
# import numpy as np
# yx = str(input('输入石头剪刀布：'))
# res = np.random.choice(['石头','剪刀','布'])
# if res == yx :
# print('猜对了')
# else:
# print('猜错了，应该是 {}'.format(res))
# import math
# a = float(input('a = '))
# b = float(input('b = '))
# c = float(input('c = '))
# if a + b > c and a + c > b and b + c > a:
# l = a + b + c
# print('周长为: %f' % (a + b + c))
# p = (a + b + c) / 2
# area = math.sqrt(p * (p - a) * (p - b) * (p - c))
# print('面积为: %f' % (area))
# else:
# print('不是三角形')
# mima = 100000
# password = int(input('请输入你的密码'))
# for i in range(3):
# if password == mima:
# print('对了')
# break
# else:
# print('输入错误')
# password = int(input('请输入你的密码'))
# else：
# print('账号锁定')
# ini_password = 100000
# input_ = int(input('请输入密码>>:'))
# i=0
# while i < 2:
# i +=1
# if input_ == ini_password:
# print('ok')
# break
# else:
# print('密码错误重新输入')
# input_ = int(input('请输入密码>>:'))
# else:
# print('账号锁定')
# m = int(input('m = '))
# n = int(input('n = '))
# fm = 1
# while m != 1:
# fm *= m
# print(m)
# m -= 1
# print(fm)