#include<bits/stdc++.h> using namespace std; int main() { double a , b , c , d; cin >> a >> b >> c >> d; for(double i = -100 ; i <= 100;i += 0.001) { if(fabs(i * i * i * a + i * i * b + i * c + d) < 0.0001) printf("%.02lf " , i); } return 0; }