H90 合法IP python解法
合法IP
http://www.nowcoder.com/questionTerminal/995b8a548827494699dc38c3e2a54ee9
def process(s): try: if len([i for i in s.split('.') if int(i)<=255 and int(i) >= 0])==4: return True except: return False return False while True: try: if process(raw_input()): print "YES" else: print "NO" except Exception as e: break