if you get WA on test #2, then try to use unsigned char* instead char*

I have done it with char s[], you don't have to use unsigned char s[] !!!
I used scanf ...

Edited by author 03.04.2010 00:08

I had WA2 with some test like this
'a' like '[a-]'
YES

Because there may be spaces in the input, "scanf("%s")" may not be accepted...