#include <iostream>
 
static unsigned int masterID = 0;
 
class game {
public:
    unsigned int m_id;
    unsigned int m_players;
 
    game() : m_id(masterID++), m_players()
    { }
 
    game(unsigned int players) : m_id(masterID++), m_players(players)
    { }
};
 
int main()
{
    std::cout << masterID << '\n';
    game a;
    std::cout << masterID << '\n';
    game b;
    std::cout << masterID << '\n';
    game c(42);
    std::cout << masterID << '\n';
}
 

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