#include <iostream>
#include <unordered_map>

struct Point {
    int x;
    int y;

    bool operator==(const Point& other) {
        return x == other.x && y == other.y;
    }

};

namespace std {
    template<>
    struct hash<Point> {
        inline size_t operator()(const Point& point) const {
            return point.x * 1024 + point.y;
        }
    };
}


int main() {
    std::unordered_map<Point, int> points_map;

    points_map.emplace(Point{1, 2}, 3);

    std::cout << points_map.size();
}