#include <cstdio>

using namespace std;

int n,m;
int nr=0;



struct punct
{
    int x,y;
}Vf[808];


punct Ext;


void citire()
{
    scanf("%d %d",&n,&m);
    for(int i=0;i<n;i++)
        scanf("%d %d",&Vf[i].x,&Vf[i].y);
}

long long determ(int x,int y,punct a,punct b)
{
    long long f=((a.x-x)*(b.y-y)-(a.y-y)*(b.x-x));
    return f;
}


void verif(int x,int y)
{
    long long f1,f2;
    int cont=0;
    for(int i=1;i<n;i++)
    {
     f1=determ(x,y,Ext,Vf[i-1]);
     f2=determ(x,y,Ext,Vf[i]);
     if(f1>0 && f2<0)
        cont++;
     else if(f1<0 && f2>0)
        cont++;
     if(f1==0)
     {
         f1=determ(Vf[i].x,Vf[i].y,Vf[i-1],Ext);
         f2=determ(x,y,Vf[i],Vf[i-1]);
        if(f1>0 && f2<0)
            cont++;
        else if(f1<0 && f2>0)
            cont++;
     }
    }
    if(cont%2!=0)
        nr++;
}




int main()
{
    Ext.x=60005;
    Ext.y=60005;

    freopen("poligon.in","r",stdin);
    freopen("poligon.out","w",stdout);

    citire();
    int x,y;
    for(int i=0;i<m;i++)
    {
    scanf("%d %d",&x,&y);
    verif(x,y);
    }

    printf("%d",nr);
    return 0;
}