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