???? Vertex N ????? ??????
????? ????? ?????? ?? ????? Vertex N ????? ??????? ?????? ????? ????? N? ??? ??????? ??????? ?? ???????? ??????? ??????? ??? ????? ?????? ?? ???????? ?????? ????? ?????? ?????? ???? ???? ??? ?????.
?????????? ??? ???? ??????? ???????? ???? 210 ??? ????? ??????? ???? ??? ?????? ?????? ??????? ????? ???? ?????? ???????? ????? ?????? ???? ??????.
???????? ??? ????? 210 ?? ?????? ????? N? ???? ????? Vertex N ????? ??????? ?? ????? ?????? ???????.