I tried to submit many times my solution which I think is right but I got WA 1 many times. Then I submitted the following solution:

#include <iostream>
using namespce std;
int main()
{
    cout<<"YES";
    return 0;
}

and I still have WA1, why (as far as I know the first test is the same as the sample test where the right output is YES)

Edited by author 30.06.2006 20:18

Yup, you are right, when I submitted the following solution:

#include <iostream>
using namespce std;
int main()
{
cout<<"NO";
return 0;
}

I got WA 2, so it seems the problem is in my code :)