void learnProto(double alpha, Prototypes::imagette &w, const uci::Database::imagette &xi)
{
    for (int i = 0; i < uci::Database::imagette::height; ++i)
        for (int j = 0; j < uci::Database::imagette::width; ++j)
            w(i, j) += alpha * (xi(i, j) - w(i, j));
}

double distanceProto(const Prototypes::imagette &w, const uci::Database::imagette &xi)
{
    double dist = 0;
    for (int i = 0; i < uci::Database::imagette::height; ++i)
        for (int j = 0; j < uci::Database::imagette::width; ++j)
            dist += pow(w(i, j) - xi(i, j), 2);
    return dist;
}

void winnerProto(const Prototypes &protos, const uci::Database::imagette &xi, int &i, int &j)
{

}