#include <iostream>

constexpr int square(int n) 
{
  return n*n;
}

constexpr int q = square(3); 

struct Point
{
  constexpr Point(int x, int y) : x(x), y(y) {}
  int x, y;
};

constexpr Point p{4, square(4)};

int main()
{
  std::cout << p.x << ' ' << p.y <<  '\n';
}