ProcedurProgramavimas_1.11

#include <iostream>

using namespace std;

int main()
{
    long double disc, z, x1, x2;
    long double a, b, c;
    cin>>a;
    cin>>b;
    cin>>c;

    disc=(b*b)-(4*a*c);
    z=sqrt(disc);

    if(disc>0)
    {
        x2=((-(b))+z)/(2*a);
        x1=((-(b))-z)/(2*a);
        cout<<x1<<"_"<<x2<<endl;
    }
    if(disc==0)
    {
        x1=((-(b))-z)/(2*a);
        cout<<x1<<endl;
    }
    if(disc<0)
    {
        cout<<"NO"<<endl;
    }
    return 0;
}