#include <cstdio>
#include <cstring>
#include <cmath>
#include <climits>
#include <cstdlib>
#include <algorithm>
using namespace std;

double a,b,c,d,x,x1,x2,x3;
double F(double x){
	return ((a*x+b)*x+c)*x+d;
}

/*#include <cstdio>
#include <cstring>
#include <cmath>
#include <climits>
#include <cstdlib>
#include <algorithm>
typedef long long LL;
const double EPS = 1e-11;
#define MAXN 100005
using namespace std;

inline int L(int x){ return (x<<1); }
inline int R(int x){ return (x<<1)+1; }

int M=0;
LL Sum[MAXN<<2]={0},Add[MAXN<<2]={0};
int s=0,t=0,v=0;

void PushUp(int x){
	Sum[x]=Sum[L(x)]+Sum[R(x)];
}

void BuildTree(int n){
	for(M=1;M<n+2;M<<=1);
	for(int i=1;i<=n;++i)	scanf("%lld",&Sum[i+M]);
	for(int i=M-1;i>0;--i)	PushUp(i);
}

void PushDown(int x,int l){
	if(Add[x]!=0){
		Add[L(x)]+=Add[x];	Add[R(x)]+=Add[x];
		Sum[L(x)]+=Add[x]*(l-(l>>1));
		Sum[R(x)]+=Add[x]*(l>>1);
		Add[x]=0;
	}
}

void UpData(int l,int r,int x){
	if(s<=l && r<=t){
		Add[x]+=v;	Sum[x]+=v*(r-l+1);	return;
	}
	PushDown(x,r-l+1);
	int Mid=(l+r)>>1;
	if(s<=Mid)	UpData(l,Mid,L(x));
	if(t>Mid )	UpData(Mid+1,r,R(x));
	PushUp(x);
}

LL Query(int l,int r,int x){
	if(s<=l && r<=t){
		return Sum[x];
	}
	int Mid=(l+r)>>1;
	LL Ans=0;
	if(s<=Mid) Ans+=Query(l,Mid,L(x));
	if(t> Mid) Ans+=Query(Mid+1,r,R(x));
	return Ans;
}

int main(){
	//freopen("","r",stdin);
	//freopen("","w",stdout);
	
	int N,K=0;
	scanf("%d %d",&N,&K);
	//printf("%d\n",K);
	BuildTree(N);
	while(K--){
		char c;	int a,b,d;
		scanf("%s",&c);
		if(c=='Q'){
			scanf("%d%d",&a,&b);
			s=a;	t=b;
			printf("%lld\n",Query(1,M,1));
		}
		else{
			scanf("%d%d%d",&a,&b,&d);
			s=a; t=b; v=d;
			UpData(1,M,1);
		}
	}
	
	while(1);
	fclose(stdin);
	fclose(stdout);
	return 0;
}*/

int main(){
	freopen("3cfc.in","r",stdin);
    freopen("3cfc.out","w",stdout);
    
	scanf("%lf%lf%lf%lf",&a,&b,&c,&d);
	for(double i=-100;i<=100;i++){
		x1=i;
		x2=i+1;
		if(F(x1)==0) printf("%.2f ",x1);
		if((F(x1))*(F(x2))<0){
			while(x2-x1>=0.001){
				x3=(x2+x1)/2;
				if((F(x1))*(F(x3))<=0) x2=x3;
				else  x1=x3; 
			}
			printf("%.2f ",x1);
		}
	}
}