import java.util.*;

public class Fibonacci
{
    private int number1 = 0;
    private int number2 = 1;
    private int number3;

    public void getNumber()
    {
        Scanner reader = new Scanner(System.in);
        System.out.print("Enter a postive integer: ");
        int answer = reader.nextInt();

        if (answer == 1)
        {
            System.out.println(number1);
        }
        else if (answer == 2)
        {
            System.out.println(number2);
        }
        else if (answer > 2)
        {
            int startNumber = 3;
            while (startNumber <= answer)
            {
                number3 = number1 + number2;
                number1 = number2;
                number2 = number3;
                startNumber++;
            }
            System.out.println(number3);
        }
        else
        {
            System.out.println("That's not positive...");
        }
        reader.close();
    }
}