#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c, k;
  float out, out2;
  scanf("%d %d %d", &a, &b, &c);
  k = b * b - 4 * a * c;
  if (k >= 0) {
    if (k == 0) {
      out = -b / (2 * a);
      printf("1\n%.7lf", out);
      return 0;
    } else {
      out = (-b + sqrt(k)) / (2 * a);
      out2 = (-b - sqrt(k)) / (2 * a);
      printf("2\n%.7lf\n%.7lf", out, out2);
    }
  } else
    printf("0");
  return 0;
}
