#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) {
    cout << 1 << endl;
    cout << -B / (2 * A) << endl;
  } else if (D > 0) {
    cout << 2 << endl;
    cout << (-B + sqrt(D)) / (2 * A) << endl;
    cout << (-B - sqrt(D)) / (2 * A) << endl;
  } else
    cout << 0 << endl;
}
