#include <iostream>
#include <algorithm>
#include <cmath>
#include <iomanip>
// #pragma GCC optimize(2)
// #pragma GCC optimize(3)
using namespace std;
double a, b, c, d;
double eps = 1e-8;

bool check(double x) {
	return fabs(a * x * x * x + b * x * x + c * x + d) < eps;
}

int main() {
	ios::sync_with_stdio(false);
	cout.tie(nullptr), cin.tie(nullptr);
	cin >> a >> b >> c >> d;
	for (double i = -100; i <= 100; i += 0.001) {
		if (check(i)) {
			cout << fixed << setprecision(2) << i << " "; 
		}
	}
	cout << endl;
	return 0;
}