Blackone

// JollyJumpers.java
// Author: Jeffrey Cartagena

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

public class JollyJumpers {

    public static void main(String[] args)throws IOException {
        try{
            Scanner inFile = new Scanner(new FileReader("data.in"));
            PrintWriter outFile = new PrintWriter(new FileWriter("data.out"));
            int qty;
            int[] numbers;
            int[] results;

            while(inFile.hasNextInt())
            {
                qty = inFile.nextInt();
                numbers = new int[qty];
                results = new int [qty-1];

                for(int i=0; i < qty; i++)
                    numbers[i] = inFile.nextInt();

                for(int i=0; i < qty-1; i++)
                    results[i] = Math.abs(numbers[i] - numbers[i+1]);

                boolean jolly = true;
                for(int i=0; i < qty-2; i++)
                {
                    if(Math.abs(results[i]-results[i+1]) != 1)
                    {
                        jolly = false;
                        break;
                    }
                }

                if(jolly)
                    outFile.println("Jolly");
                else
                    outFile.println("Not Jolly");

            }

            System.out.println("Finishing the program");
            System.in.read();

            inFile.close();
            outFile.close();

        }

        catch(IOException ex){
            System.out.println("Input file doesn't exist");
            System.in.read();
        }

    }

}