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