import java.util.*; import java.io.*; import java.math.*; public class Main { public static void main(String[] args) throws Exception { Scanner sc = new Scanner(System.in); double a = sc.nextDouble(); double b = sc.nextDouble(); double c = sc.nextDouble(); double chk = b*b - (4*a*c); if(chk < 0){ System.out.println(0); }else if(chk == 0){ System.out.println(1); System.out.println(-b/(2*a)); }else{ System.out.println(2); if(a < 0){ System.out.println((-b-Math.pow(chk,0.5))/(2*a)); System.out.println((-b+Math.pow(chk,0.5))/(2*a)); }else{ System.out.println((-b-Math.pow(chk,0.5))/(2*a)); System.out.println((-b+Math.pow(chk,0.5))/(2*a)); } } } }