???? ?????? ?????? ???????? ????? ???? ???? ??? ????, ???? ?? ?????? ??? ???? ????. ??? ??? ????? ???? ?? ??? ???? ?? ??? ????? ????? ????? ???. ??? 1: ??? ??? ???? ??? ? ???? ????? ????? ????? ???. ??? 2: ??? ??? ??? ? {??????? ??????? ?? ????, ?? ???? ???? ???? ???? ??? ???? ??? ???. ??? 3: ??? ??? ??? ???? ???? ? ???? ??????? ??