#include <cstdio>
FILE *f,*g;
struct cp{int x,y;} c,p;
struct cp2{int x,y,z;} aux,s[800];
cp v[800];
int i,j,n,m;
bool ok;

inline int fu(cp a,cp2 b) {

return (b.x*a.x+b.y*a.y+b.z);

}

int main() {
f=fopen("poligon.in","r");
g=fopen("poligon.out","w");

fscanf(f,"%d%d",&n,&m);

c.x=c.y=0;

for (i=1;i<=n;i++)  {
	fscanf(f,"%d%d",&v[i].x,&v[i].y);
	c.x+=v[i].x;
	c.y+=v[i].y;
	}

aux.x=v[1].y-v[n].y;
aux.y=v[n].x-v[1].x;
aux.z=v[1].x*v[n].y-v[1].y*v[n].x;
s[1]=aux;

for (i=2;i<=n;i++) {
	aux.x=v[i].y-v[i-1].y;
	aux.y=v[i-1].x-v[i].x;
	aux.z=v[i].x*v[i-1].y-v[i].y*v[i-1].x;
	s[i]=aux;
	}

c.x=c.x/n;
c.y=c.y/n;
int sol=0;

for (i=1;i<=m;i++) {
	fscanf(f,"%d%d",&p.x,&p.y);
	ok=true;
	for (j=1;j<=n;j++) {
		if (fu(p,s[j])*fu(c,s[j])<0) {
			ok=false;
			break;
			}
		}
	if (ok==true)
		sol++;
	}

fprintf(g,"%d",sol);
fclose(g);

}