#include <iostream>

class Krug
{
public:
    Krug(double x_, double y_, double rad_)
    {
        x = x_;
        y = y_;
        rad = rad_;
    }

    bool soderjitNachalo()
    {
        double r = (0 - x) * (0 - x) + (0 - y) * (0 - y);

        if (r <= rad * rad)
            return true;

        return false;
    }

private:
    double x, y;
    double rad;
};


int main()
{
    double x, y, rad;

    std::cout << "x: ";
    std::cin >> x;

    std::cout << "y: ";
    std::cin >> y;

    std::cout << "radius: ";
    std::cin >> rad;

    Krug krug(x, y, rad);

    if (krug.soderjitNachalo())
        std::cout << "Soderjit nachalo koordinat.\n";
    else
        std::cout << "Ne soderjit nachalo koordinat.\n";

    return 0;
}