题解 | #判断两个IP是否属于同一子网#

有点乱，可以拆分成多个函数

while True:
    try:
        found = True
        mask = list(map(int, input().strip().split('.')))
        ip1 = list(map(int, input().strip().split('.')))
        ip2 = list(map(int, input().strip().split('.')))
        for i in range(len(mask)):
            if mask[i]<0 or ip1[i]<0 or ip2[i]<0 or mask[i]>255 or ip1[i]>255 or ip2[i]>255:
                print(1)
                found = False
                break
            mask[i] = bin(mask[i]).replace('0b', '').rjust(8,'0')
            ip1[i] = bin(ip1[i]).replace('0b', '').rjust(8,'0')
            ip2[i] = bin(ip2[i]).replace('0b', '').rjust(8,'0')
        if not found:
            continue
        mask__ = ''.join(mask)
        for i in range(len(mask__)):
            if mask__[-1] == '0':
                mask__= mask__[:len(mask__)-1]
            else:
                break
        if '0' in mask__:
            print(1)
            found = False
        if not found:
            continue
        for i,j,k in zip(mask,ip1,ip2):
            first,second = '',''
            for x in range(len(i)):
                if int(i[x]) and int(j[x]):
                    first += str(i[x])
                else:
                    first += '0'

                if int(i[x]) and int(k[x]):
                    second += str(i[x])
                else:
                    second += '0'
            if first != second:
                print(2)
                found = False
                break
        if not found:
            continue
        else:
            print(0)
    except:
        break