#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i = 0; i < (n);i++)
#define sz(x) int(x.size())
typedef long long ll;
typedef pair<int,int> P;

int main(){
  std::cout<<std::fixed<<std::setprecision(18);
  long double a, b, c;
  cin >> a >> b >> c;
  long double D = b * b - 4 * a * c;
  if (D < 0) {
    cout << 0 << endl;
    return 0;
  }
  long double x1 = 2*c / (-b + sqrt(D));
  long double x2 = 2*c / (-b - sqrt(D));
  if (D == 0) {
    cout << 1 << endl;
    cout << x1 << endl;
  } else {
    cout << 2 << endl;
    cout << x1 << endl;
    cout << x2 << endl;
  }
  return 0;
}