tijie

#include<bits/stdc++.h>
using namespace std;
double a,b,c,d;
int main(){
	cin>>a>>b>>c>>d;
	for(int i=-100;i<=100;i++){
		double l=i,r=i+1;
		double fl=a*l*l*l+b*l*l+c*l+d;
		double fr=a*r*r*r+b*r*r+c*r+d;
		if(!fl) printf("%.2lf ",l);
		if(fl*fr<0){
			while(l+0.001<=r){
				double mid=(l+r)/2;
				double fm=a*mid*mid*mid+b*mid*mid+c*mid+d;
				if(fr*fm<0) l=mid;
				else r=mid;
			}
			printf("%.2lf ",l);
		}
	}
	return 0;
}