题解 | #判断两个IP是否属于同一子网#

人生苦短，我用python 都不用做二进制，直接&运算hhh

while True:
    try:
        x = input().split('.')
        y = input().split('.')
        z = input().split('.')
        m, n = [], []
        for i in range(len(x)):
            x[i] = int(x[i])
            y[i] = int(y[i])
            z[i] = int(z[i])
        if x[0]!= 255 or x[3]!=0 or max(x+y+z)>255 or min(x+y+z)<0:
            print('1')
        else:
            for i in range(len(x)):
                m.append(int(x[i]) & int(y[i]))
                n.append(int(x[i]) & int(z[i]))
            if m == n:
                print('0')
            else:
                print('2')
    except:
        break