OJ Board

If I'm not mistaken, there are at least to possible answers for N=13, which are 1 and 7.

I think the wording should say something like "If there's more than one solution, print the lowest possible m."

read the thread "Giving up on gcj"...

First, I think your mailer is breaking the lines where it shouldn't.
You are using the ReadLn() function and there's a comment on it that extends through two lines. Something like //utility function to read from stdin.

The compiler thinks that "stdin" is a normal statement that should be compiled ...

I don't think that creating your own classes has anything to do with the problem. I've got programs Accepted with classes of my own.
try doing this on main:

public static void main(Strign args[])
{
Main m = new Main();
m.start();
}

private void start()
{
//all functionality here
}

Read the thread "Giving up on gcj" for some help. Basically, you should try creating an instance of your Main class and call methods on it:

...
public static void main(String args[])
{
Main m = new Main();
m.start();
}

private void start()
{
//implement all functionality here
}
...

This ...

I also spent a few desperate days with that same problem. What I did, and haven't got an "Internal Compiler Error" since, was something like this:

import ....

class Main
{

static String ReadLn()
{
...
}

public static void main(String args[])
{
Main m = new Main();
m.start();
}

private void ...

I have two almost perfectly equivalent (on my mind they're equivalent) programs. One in Java, the other one in C. One gets Accepted by the judge, the other doesn't. Obviously, it's the Java one that doesn't work :)
Originally, I was using different ways to solve the problem. For example, I was using ...

I have two almost perfectly equivalent (on my mind they're equivalent) programs. One in Java, the other one in C. One gets Accepted by the judge, the other doesn't. Obviously, it's the Java one that doesn't work :)
Originally, I was using different ways to solve the problem. For example, I was using ...