#include <bits/stdc++.h>
using namespace std;
int main() {
  double a, b, c, delta;
  cin >> a >> b >> c;
  delta = b * b - (4 * a * c);
  if (delta == 0) {
    cout << 1 << endl;
    cout << fixed << setprecision(5) << (-b + sqrt(delta)) / (2 * a) << endl;
  }
  if (delta < 0) cout << 0 << endl;
  if (delta > 0) {
    cout << 2 << endl;
    cout << fixed << setprecision(5) << (-b - sqrt(delta)) / (2 * a) << endl;
    cout << fixed << setprecision(5) << (-b + sqrt(delta)) / (2 * a) << endl;
  }
}
