import java.util.Scanner;

/**
 * Created by ahmedatef on 12/12/17.
 */
public class Equation {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();

        double EPSILON = 0.00000001;

        // b^2 - 4ac
        double base = b * b - 4 * a * c;

        if (Math.abs(base) < EPSILON) {
            // zero
            // 1 root
            System.out.println(1);
            double root = (-b + base) / (2 * a);
            System.out.println(String.format("%.5f", (-b + base) / (2 * a), 5));
        } else if(base > 0) {
            // 2 roots
            System.out.println(2);
            System.out.println(String.format("%.5f", (-b + base) / (2 * a), 5));
            System.out.println(String.format("%.5f", (-b - base) / (2 * a), 5));
        } else {
            // no roots
            System.out.println(0);
        }

    }
}
