#include<iostream>
#include<cstdio>
using namespace std;
long long x[1000],y[1000],xM,yM,i,n,m,ct;
double S,Arie;
int main()
{
	freopen("poligon.in","r",stdin);
	freopen("poligon.out","w",stdout);
	scanf("%d%d",&n,&m);
	for(i=1;i<=n;++i)
		scanf("%d%d",&x[i],&y[i]);
	x[n+1]=x[1];y[n+1]=y[1];
	for(i=1;i<=n;++i)
		S+=(double((x[i+1]-x[i])*(y[i]+y[i+1]))/2);
	if(S<0)
		S=-S;
	while(m--)
	{
		scanf("%d%d",&xM,&yM);
		Arie=0;
		for(i=1;i<=n;++i)
		{
			Arie+=(double(abs(xM*y[i]+x[i]*y[i+1]+x[i+1]*yM-y[i]*x[i+1]-y[i+1]*xM-yM*x[i]))/2);
		}
	if(S==Arie) ct++;
	}
	printf("%d\n",ct);
	return 0;
}