题解 | #合法IP#
import sys
for line in sys.stdin:
data=line.strip().split('.')
flag=True
for d in data:
num=int(d)
if num<0 or num>255:
flag=False
if flag:
print('YES')
else:
print('NO')
import sys
for line in sys.stdin:
data=line.strip().split('.')
flag=True
for d in data:
num=int(d)
if num<0 or num>255:
flag=False
if flag:
print('YES')
else:
print('NO')
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