#include <bits/stdc++.h>
#include <iostream>
using namespace std;
int main(){
    double a, b, c, delta, aux;
    cin>>a;
    cin>>b;
    cin>>c;
    if(a==0) cout<<"NEESG\n";
    else{
        delta = ((b*b)-(4*a*c));
        if(delta<0){
            cout<<"NRR\n";
        }else{
            if(delta==0){
                aux = ((-1*b)+ sqrt(delta))/(2*a);
                cout << setiosflags (ios::fixed) << setprecision (2)<< aux<<"\n";
            }else{
                aux = ((-1*b)+ sqrt(delta))/(2*a);
                cout << setiosflags (ios::fixed) << setprecision (2)<< aux<<"\n";
                aux = ((-1*b)-sqrt(delta))/(2*a);
                cout << setiosflags (ios::fixed) << setprecision (2)<<aux <<"\n";
            }
        }
    }
    // cout << setiosflags (ios::fixed) << setprecision (2)<< <<"\n";
}