#include<cstdio> double a,b,c,d; double fc(double x) { return a*x*x*x+b*x*x+c*x+d; } int main() { double l,r,m,x1,x2; int s=0,i; cin>>a>>b>>c>>d; for (i=-100;i<100;i++) { l=i; r=i+1; x1=fc(l); x2=fc(r); if(!x1) { cout<<fixed<<setprecision(2)<<l<<" "; s++; } if(x1*x2<0) { while(r-l>=0.001) { m=(l+r)/2; if(fc(m)*fc(r)<=0) l=m; else r=m; } cout<<fixed<<setprecision(2)<<r<<" "; s++; } if (s==3) break; } return 0; }