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