import java.util.*;

public class Main {
    public static void main(String[]  args) {
        Scanner sc = new Scanner(System.in);
        double a = sc.nextInt();
        double b = sc.nextInt();
        double c = sc.nextInt();
        double d = b * b - 4 * a * c;
        if (d < 0) {
            System.out.println(0);
        } else if (d == 0) {
            System.out.println(1);
            System.out.println(- b / a / 2);
        } else {
            System.out.println(2);
            double x = - b / a / 2 - Math.sqrt(d) / a / 2;
            double y = - b / a / 2 + Math.sqrt(d) / a / 2;
            System.out.println(x + " " + y);
        }
    }
}