#include <bits/stdc++.h>
using namespace std;
int main() {
  double a, b, c;
  cin >> a >> b >> c;
  double d = b * b - 4 * a * c;
  if (d > 0 && a != 0) {
    double x1 = (-b - sqrt(d)) / 2 * a;
    double x2 = (-b + sqrt(d)) / 2 * a;
    cout << 2 << endl;
    cout << x1 << endl;
    cout << x2;
  } else if (d = 0 && a != 0) {
    cout << 1 << endl;
    cout << (-b / 2 * a) * 1.00000;
  } else if (d < 0 && a != 0) {
    cout << 1 << endl;
    cout << 0;
  } else if (a == 0) {
    cout << 1 << endl;
    cout << -c / b;
  }
  return 0;
}
