OJ Board

I think my program is correct and I can't find what's wrong. Please help me

import java.io.*;
import java.util.*;


class JollyJumper {


public static void main(String[] args) {
JollyJumper myWork = new JollyJumper();
myWork.begin();
}

void jollyFunction(Set S,long n)
{
long i;

for(i ...