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

????? ???? ?????: ??? ?????? ??? ??????? ???????????? ??? ????? ????? ???? ????? ???????? ??? ???? ????? ???? ????? ?????? ??????. ????????? (??????? ?????????) ?? ?? ???????? ???? ? ?? ???? ???????? ?? ?????. ???? ??????? ????????????? ??? ??????? ?????? ?????? ?? ????? ??? ???????? ????????.

????? ??? ????? ??? ???? ???? ?? ??????????? ???? ????? ????? ???? ?? ????? ????? ?????. ... I also counsel that a user should be permitted to select a hard and fast problem level for the whole year, rather than specified the liberty to change it per activity. ???? ?????? ??????? ??? ???? ?? ?