# print("I'm ok.")
# print(len(b"ABC"))
# print(len("中文".encode("utf-8")))
# print("Hi %s,your score is %d."%("Bart",59))
# print(ord('A'))
# -*- coding: utf-8 -*-
# s1=72
# s2=85
# r=(85-72)/72*100
# print ("%.1f %%"%r)
# classmates = ['Michael','Bob','Tracy']
# print(classmates)
# print(len(classmates))
# print(classmates[0])
# print(classmates[2])
# -*- coding: utf-8 -*-
# L = [
#     ['Apple', 'Google', 'Microsoft'],
#     ['Java', 'Python', 'Ruby', 'PHP'],
#     ['Adam', 'Bart', 'Lisa']
# ]
# print(L[0][0])
# print(L[1][1])
# print(L[2][2])
# age = 20
# if age >= 18:
#     print('your age is', age)
#     print("adult")
# height = input('please input your height:')
# weight = input('please input your weight:')
# h = float(height)
# w = float(weight)
# bmi = w/(h*h)
# b = '小明的BMI指数是%.2f'%bmi
# if bmi<18.5:
#     print(b,"过轻")
# else:
#     print(b,"过重")
# sum = 0
# for i in range(101):
#     sum=sum+i
# print(sum)
# sum = 0
# n = 99
# while n > 0 :
#     sum = sum + n
#     n = n - 2
# print(sum)
# L = ['Bart', 'Lisa', 'Adam']
# for i in L:
#     print("hello,",i)

# n = 0
# while n < 10:
#     n = n+1
#     if n % 2 ==0:
#         continue
#     print(n)



















