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