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