abc

import java.util.*;
import java.lang.Math.*;


public class First {

public static void main(String[] args){

    Scanner sc = new Scanner(System.in);
    System.out.println("podaj a");
    double a=sc.nextDouble();
    System.out.println("podaj b");
    double b=sc.nextDouble();
    System.out.println("podaj c");
    double c=sc.nextDouble();
    double delta = (b*b)-(4*a*c);
    if(delta == 0){
        double x1 = (-b)/(2* a);
        System.out.println("jeden pierwiastek: " + x1);
        }

    else if (delta > 0)
        {
        double x1 = (-b+Math.sqrt(delta)) / (2 * a);
        double x2 = (-b-Math.sqrt(delta)) / (2 * a);
        System.out.println("Dwa pierwiastki:"  +x1 + "i "  +x2);
        }

    else
    {

        double urojona=((Math.sqrt(Math.abs(delta)))/(2*a));
        double rzeczywista=(-b/(2*a));
        System.out.println(rzeczywista+" + "+urojona+"i");
        System.out.println(rzeczywista+" - "+urojona+"i");
        }
    }


}