I don't understand that my code below get wrong answer.It can show the correct answer.Anyone, please advise me.

import java.util.Scanner;


public class root {
    public static void main(String[]args){
        Scanner in = new Scanner(System.in);
        long a = in.nextLong();
        long b = in.nextLong();
        long c = in.nextLong();
        long d = in.nextLong();



        System.out.printf("%.4f \n",Math.sqrt(d));
        System.out.printf("%.4f \n",Math.sqrt(c));
        System.out.printf("%.4f \n",Math.sqrt(b));
        System.out.printf("%.4f \n",Math.sqrt(a));
    }

}