Python题解 | #判断两个IP是否属于同一子网#

import sys


def check(ip0, ip1, ip2):
    for a in range(4):
        if ip0[a] not in range(0, 256) or ip1[a] not in range(0, 256) or ip2[a] not in range(0, 256):
            return 1
        if a < 3 and ip0[a] < ip0[a + 1]:
            return 1
    ans1 = [0] * 4
    ans2 = [0] * 4
    for i in range(4):
        ans1[i] = ip0[i] & ip1[i]
        ans2[i] = ip0[i] & ip2[i]
        if ans1[i] != ans2[i]:
            return 2
    return 0


while True:
    try:
        i0 = list(map(int, input().split('.')))
        i1 = list(map(int, input().split('.')))
        i2 = list(map(int, input().split('.')))
        print(check(i0, i1, i2))
    except:
        break