????? ????????? ? ?? ?????????? ?????? ??? ?????????? ????? ??, ????????? ????? ???????? ????????? ????? ??, ????? ?????? ??? ??? ??????????, ?????? ??????? ???????? ?????? ??? ??; ????????? ???????? ???? ?? ????? ???? ?????? ???? ???? ????? ???? ??????? ??????? ????? ????? ??? ?????? ??. .

?????? ?????????? ??? ?????????????????, ???? ??, ???? ???????? ????? ????? ???? ????????? ??????????? ???????, ??????? ??? ????? ??. ???????? ?????????? ????????, ????? ????????????? ????? ??? ??? ???? ??.

??????????????? ???????? ??????????? ?? ??????? ?????????? ??? ??:

(1) ????????????? ??????? ???????? ???????? ??????????????? ????? ??? ??, ????? ??????? ?????? ????? ???????, ??> 1 ??.

(2) ????? ?????? ?????? ?????? ???? ???? ?????????, ??????? ????????? ???, ?? <1 ??.

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