#include<fstream>
using namespace std;
typedef struct { int x,y; } punct;
punct poligon[805], multime[60005];
int i,j,n,m,sol;

int det( punct a, punct b, int x, int y ) {
    return ( a.x*b.y + y*b.x + x*a.y - x*b.y - y*a.x - b.x*a.y );
}

int main(void) {
    ifstream fin("poligon.in");
    ofstream fout("poligon.out");
    
    fin>>n>>m;
    for (i=1; i<=n; ++i) fin>>poligon[i].x>>poligon[i].y;
    poligon[n+1]=poligon[1];
    
    for (i=1; i<=m; ++i) {
        int x,y;
        fin>>x>>y;
        int nrm=0,ok=0;
        for (j=1; j<=n; ++j)
        if ( poligon[j].y<y&&poligon[j+1].y>=y ) {
           
            if ( det(poligon[j], poligon[j+1], x,y) > 0) ++nrm;
               else --nrm;
               ok=1;
            }
        else if (poligon[j].y>y&&poligon[j+1].y<=y) {
             
              if ( det(poligon[j], poligon[j+1], x,y) > 0) --nrm;
               else ++nrm;
              ok=1;
             }
            
        if (nrm==0&&ok==1) ++sol;
        
        }
    
    fout<<sol<<"\n";
    
 return(0);   
}