min_mark_data corrected in destructor precedence

Signed-off-by: aLekSer <gdocse@gmail.com>
small changes, great increase in performance

Signed-off-by: aLekSer <gdocse@gmail.com>
corrections before pull-request

Signed-off-by: aLekSer <gdocse@gmail.com>
correct work with quotes in stock_receiver and some wrong input discarding in minute_calculator

Signed-off-by: aLekSer <gdocse@gmail.com>