???? ???? ???????? ?? ?????? ?????? ???? ???? ??? ??????? ?? ???? ??? ??????? ??????? . ???? ??? ??????? ??????? ???? ????? ??? ???????. ????? ??????? ??????? ?????????. ????? ????? ?????? ?????? ?? ??????. ???? ??????? ??????? ????? ???? ?? ???????. Selecting ???? ????? ??????? ??? ????? ???? ?????? ??? ????? ??? ?????. First, ??? obj