#include<bits/stdc++.h> #define ll long long using namespace std; int main() { double a,b,c,d,e; cin>>a>>b>>c>>d; for(e=-100.00;e<=100.00;e+=0.01) { if(a*e*e*e+b*e*e+c*e+d==0) { printf("%.2f ",e); } } return 0; }