#include <iostream>

class Point {
    double x, y;
public:
    Point(double x, double y) : x(x), y(y) {
        std::cerr << "CTOR 1: (double,double)\n";
    }

    Point(double x) : Point(x,0) {
        std::cerr << "CTOR 2: (double)\n";
    }
    Point() : Point(0) {
        std::cerr << "CTOR 3: ()\n";
    }
};

int main() {
    std::cerr <<   "Point p1(1,1)\n";
    Point p1(1,1);
    std::cerr << "\nPoint p2(2)\n";
    Point p2(2);
    std::cerr << "\nPoint p3\n";
    Point p3;
}