#include <iostream>
#include <cmath>
using namespace std;

int main()
{
    double a,b,c;
    double x=0;
    cin>>a>>b>>c;

    double delta = (b*b)-(4*a*c);

    if(a==0)
    {
        if(b==0)
        {
            if(c==0)
            {
                cout<<"NWR"<<endl;
            }
            else
                cout<<"BR"<<endl;
        }
        else
        {
            double x=-b/c;
            cout<<x;
        }
    }
    else
        if(delta>0)
        {
            double x1=(-b-(sqrt(delta)))/(2*a);
            double x2=(-b+(sqrt(delta)))/(2*a);
            cout.precision(2);
            cout<<fixed<<"x1= "<<x1<<endl;
            cout<<fixed<<"x2= "<<x2<<endl;

        }
        else
            if(delta==0)
            {
                double xx=-b/2*a;
                cout<<xx;
            }
            else
                cout<<"BR";
    return 0;
}