#include<bits/stdc++.h>
using namespace std;

int main(){
	int a,b,c,h;
	cin>>a>>b>>c;
	h=b*b-4*a*c;
	if (h<0) { cout<<"error";}
	else{
	if (h==0) {cout<<fixed<<setprecision(3)<<(-1*b*1.0/(2*a));}
	else{
		cout<<fixed<<setprecision(3)<<((-1*b-sqrt(h))*1.0/(2*a))<<" "<<((-1*b+sqrt(h))*1.0/(2*a));
	}
	}
	return 0;
}