// To be implemented by all players
interface Player {
    void reset();
    int move(int opponentLastMove, int xA, int xB, int xC);
}

// Player implementations
class AlwaysA implements Player {
    AlwaysA() {}
    @Override
    public void reset() {}

    @Override
    public int move(int opponentLastMove, int xA, int xB, int xC) {
        return 1;
    }
}

/*
    LIST OF OTHER PLAYER IMPLEMENTATIONS GOES HERE
*/

class Tournament {
    Tournament(Player[] candidates, int numTurns, int numRepetitions) { ... }
    void play() { ... }
    void printResults() { ... }
}

public class DragosStrugarTesting {
    public static void main(String[] args) throws Exception {
        Player[] candidates = new Player[2];
        candidates[0] = new AlwaysA();
        candidates[1] = new AlwaysB();

        Tournament t = new Tournament(candidates, 1000, 100);
        t.play();
        t.printResults();
    }
}