题解 | #整数与IP地址间的转换#

import sys
def ip2num(l):
     a=list(map(int,l.split('.')))
     bs=''
     for i in a:
        bs+=bin(i)[2:].rjust(8,'0')
     res = int(bs,2)
     print(res)
def num2ip(l):
    a= int(l)
    crr =[]
    bs = bin(a)[2:].rjust(32,'0')
    for i in range(4):
        crr.append(int(bs[8*i:8*i+8],2))
    num = '.'.join(list(map(str,crr)))
    print(num)
while True:
    try:
        ip1 = input()
        num2 = input()
        num1 =ip2num(ip1)
        ip2 =num2ip(num2)
    except:
        break