题解 | #判断两个IP是否属于同一子网#
判断两个IP是否属于同一子网
https://www.nowcoder.com/practice/34a597ee15eb4fa2b956f4c595f03218
mask = list(map(int, input().split('.')))
ip1 = list(map(int, input().split('.')))
ip2 = list(map(int, input().split('.')))
mask_1=''.join([i[2:].zfill(8) for i in list(map(bin, mask))])
def check(line, count):
line = list(map(bin, line))
line = [i[2:].zfill(8) for i in line]
line = ''.join(line)
for i in range(0,25,8):
record[count].append(int(line[i:i+8], 2) & int(mask_1[i:i+8], 2))
if max(mask) > 255 or mask_1.rfind('1') +1 != mask_1.find('0') or min(mask) < 0:
print(1)
elif max(ip1) > 255 or max(ip2) > 255 or min(ip1)<0 or min(ip2)<0:
print(1)
else:
record = [[], []]
check(ip1, 0)
check(ip2, 1)
flag = 0
for i in range(4):
if record[0][i] != record[1][i]:
print(flag:=2)
break
if flag != 2:
print(0)
一早上就做了个这，求指教
