jff

    void f(int field_size)
    {
        bool victory = false;

        for (size_t x = 0; x < field_size; ++x)
        {
            unsigned total_in_column = 0, total_in_line = 0;

            for (size_t y = 0; y < field_size; ++y)
            {
                if (tiles[x + y*field_size].state == PLAYER_STATE::TURN) ++total_in_column;
                if (tiles[y + x*field_size].state == PLAYER_STATE::TURN) ++total_in_line;
            }

            if (total_in_column == field_size || total_in_line == field_size)
            {
                victory = true;
                break;
            }
        }
    }