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