I am use __int64 and sorting points:
inline short polarCmp(int a,int b)
{
    __int64 x1 = __int64(p[a].x)-p[0].x;
    __int64 y1 = __int64(p[a].y)-p[0].y;
    __int64 x2 = __int64(p[b].x)-p[a].x;
    __int64 y2 = __int64(p[b].y)-p[a].y;
    __int64 vp = x1*y2-x2*y1;
    return (vp<0)?-1:(vp==0)?0:1;
}
p[0] - most down left point

Edited by author 12.08.2006 13:00

Hm... I'm change QuickSort to Heapsort and get AC!!!