编写题解 1116: IP判断

解题思路:

注意事项:

参考代码:

while True:

    s=input()

    if s=='End of file':

        break

    a,b,c,d=s.split('.')

    if a.isdigit() and b.isdigit() and c.isdigit() and d.isdigit():

        if a[0]!='0' and b[0]!='0' and c[0]!='0' and d[0]!='0':

            if 0<=int(a)<=255 and 0<=int(b)<=255 and 0<=int(c)<=255 and 0<=int(d)<=255:

                print('Y')

            else:

                print('N')

        else:

            print('N')

    else:

        print('N')