# coding=utf-8
# print   input()
#=================   
#a = 25
#b = 30
#c = (a + b) / (a - b)
#print ('c = ',c)
#=================
#练习001
#简单的print语句
#d = input() #输入字符串
#print ('what you input is :',d)
#print ('#---->or you can use this \'e = input(\'please input a \string\')\'')
#e = input('please input a string: ')
#print ('what you input is:e =',e)
#=================
#用print输出 1024*768=?
#print ('1024 * 768 = ',1024*768)
#=================
#print absoluta value of an integer
#f = input()
#f = int(f)#此处如果不加int(),会报错提示str()->int()错误
##f = -3000
#if f > 0:
#    print (f)
#else:
#    print (-f)
#=================
