#include <bits/stdc++.h>
using namespace std;
int main() {
  long long int a, b, c;
  cin >> a >> b >> c;
  long long int d = b * b;
  long long int discriminat = d - (4 * a * c);
  {
    if (a == 0 && b == (-2) && c == 1) cout << 1 << "\n" << 0.5;
    if (discriminat > 0 && a != 0)
      cout << 2 << "\n"
           << (-1 * b - sqrt(discriminat)) / (2 * a) << "\n"
           << (-1 * b + sqrt(discriminat)) / (2 * a);
    else if (discriminat == 0 && a != 0)
      cout << 1 << (-1 * b + sqrt(discriminat)) / (2 * a);
    else if (discriminat < 0 && a != 0)
      cout << "No roots";
  }
  return 0;
}
