#include<bits/stdc++.h> using namespace std; double a,b,c,d,ans[5];int n=0; double f(double x){ return a*x*x*x+b*x*x+c*x+d; } void sb(double left ,double right){ if(left>right||n>2||f(left)*f(right)>0&&right-left<1)return ; double mid =(left+right)/2; if(abs(f(mid))<1e-4) { ans[++n]=mid; sb(left,mid-1); sb(mid+1,right); }else{ sb(left,mid); sb(mid,right); } } int main() { cin>>a>>b>>c>>d; sb(-100,100); sort(ans+1,ans+4); for(int i=1;i<=n;i++)printf("%0.2lf ",ans[i]); }