unsigned balanced_digits( int n ) __override
{
    unsigned counts = 0;

    while ( n )
    {
        int d = n % 3;
        n /= 3;

        if ( d == 2 || d == -2 )
        {
            d /= -2;
            n -= d;
        }

        if ( d == 1 )
            counts += 0x0001u;
        else if ( d == -1 )
            counts += 0x0100u;
    }

    return counts;
}