#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cstring>
#include<cmath>
#define REP(i,a,b) for(int i=a;i!=b+1;++i)
#define CLR(c,x) memset(c,x,sizeof(c))
#define maxn 1000+10
#define eps 1e-9
using namespace std;

void setIO(string s){
	string in=s+".in",out=s+".out";
	freopen(in.c_str(),"r",stdin);
	freopen(out.c_str(),"w",stdout);
}

double a,b,c,d;

double f(double x){
	return a*x*x*x+b*x*x+c*x+d;
}

int main(){
	setIO("3cfc");
	scanf("%lf%lf%lf%lf",&a,&b,&c,&d);
	
	REP(i,-100,100){
	    double L=i+eps,R=i+1+eps;
	    if(f(L)*f(R)>0)continue;
	    while(R-L>eps){
		    double mid=(L+R)/2;
		    if(f(mid)*f(L)<0)R=mid;
		    else L=mid;
	    }
	    printf("%.2lf ",L);
	}
	
	return 0;
	
}