??????? ??? ???????? ??? ???? IOI997 ??? ?????? ????? ???????????? ??????? ????? ????????? ??????. ???????????? ??? ?????????? ???-??? ?? 24??????? ???? ???????????????? ??? ???????????? ??????????????????????? ????? ?????? ??????? ?????? ??? ioi997 . ????? ????? ?????????????? . ??????????? ?????? ??? ???????? ???! ??? ????? ioi997 ????