#include <iostream>
#include <math.h>

class Point2D {
public:
    int x;
    int y;

    Point2D(int x_ = 2, int y_ = 3):x(x_), y(y_) {}

};

class Circle {
public:
    int x;
    int y;
    int r;

    Circle(int x_ = 2, int y_ = 3 , int r_ = 4):x(x_),y(y_),r(r_) {}

    bool is_inside(const Point2D & p ) {
        if ((p.x - x) * (p.x - x) + (p.y - y) * (p.y - y) <=  r*r)
            return true;
        else
            return false;

    }
};

using namespace std;

int main() {
    Point2D punkt{1,1};
    Circle kolko{0,0,2};
    cout << boolalpha <<kolko.is_inside(punkt);


    return 0;
}