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
while True:
try:
mask,ip1,ip2=input().split('.'),input().split('.'),input().split('.')
tag=0
for i in [mask,ip1,ip2]:
if len(i)!=4:
tag=1
break
for j in i:
if not j.isdigit:
tag=1
break
else:
if int(j)<0 or int(j)>255:
tag=1
break
if tag==1:
break
if tag==1:
print(1)
continue
smask=''
for i in mask:
smask+=bin(int(i))[2:].zfill(8)
if smask.find('0')-1==smask.rfind('1'):
pass
else:
tag=1
if tag==1:
print(1)
continue
sip1=''
for i in ip1:
sip1+=bin(int(i))[2:].zfill(8)
sip2=''
for i in ip2:
sip2+=bin(int(i))[2:].zfill(8)
if int(smask,2) & int(sip1,2)==int(smask,2) & int(sip2,2):
print(0)
else:
print(2)
except:
break
