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# -*- coding:utf-8 -*-
__author__ = 'gjw'
__time__ = '2018/1/10 0010 上午 9:52'
# 题目:取一个整数a从右端开始的4〜7位。
"""
程序分析:可以这样考虑:
(1)先使a右移4位。
(2)设置一个低4位全为1,其余全为0的数。可用~(~0<<4)
(3)将上面二者进行&运算。
"""
if __name__ == '__main__':
a = int(input('input a number:\n'))
b = a >> 4
c = ~(~0 << 4)
print(bin(c))
d = b & c
print('%o\t%o' %(a,d))
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