#include <iostream>
#include <cmath>
#include <iomanip>
using namespace std;
int main()
{
   double a,b,c;
   cin>>a>>b>>c;
   double delta=b*b-4*a*c;
   if (delta>0)
   { 
      double x1=(-b+sqrt(delta))/(2*a);
      double x2=(-b-sqrt(delta))/(2*a);
      cout<<fixed<<setprecision(2);                    
      cout<<"x1="<<x1<<endl;
      cout<<"x2="<<x2<<endl;
   }
  else if (delta==0)
  {
     double x=-b/(2*a);
     cout<<fixed<<setprecision(2);
     cout<<"x="<<x<< endl;
  }
  else
  {
    cout<<"No root."<< endl;
  }
  return 0;
}