#include<bits/stdc++.h>
using namespace std;
double a,b,c,d;
double fx(double t)
{
    return a*t*t*t+b*t*t+c*t+d;
}
int main()
{
    int s=0; 
    cin>>a>>b>>c>>d;
    double k=-100.0;
    for(;k<=100.0&&s<=3;k+=0.01)
    {
        if(fx(k)>=-0.001&&fx(k)<=0.001)
        {
            cout<<fixed<<setprecision(2)<<k<<" ";
            s++;
        }
    }
    return 0;
}