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