??????? ??? ????????? ??? ioi997 ??? ?????? ???? ????? ???????? ????? ?????????? ??????????. ????? ??? ?????????? ???????? ??????? 24??????? ???? ???????????????? ??? ??? ????? ??????????????????????? ????? ?????? ??????? 24 ?? ??? ioi997 . ????????????????? ?????? pc. ????? ??? ??? ??????