import java.math.*;
import java.util.*;
public class Fibonacci
{
public static void main(String[]args){

//Declera The variables
final String TAB = "/t";
final String NEWLINE = "/n";
final double SQ_RT_5 = Math.sqrt(5);

double Fn,answer;
Scanner scanner;
scanner = new Scanner(System.in);
System.out.println("Which Fibonacci number would you like to calculate?");
Fn = scanner.nextInt();
//Compute the results
answer = (Fn*(1+(int)Math.sqrt(5))-(Fn*1-(int)Math.sqrt(5)))*1/(int)Math.sqrt(5);
System.out.println("The answer is: "+answer);
}
}