//
//  main.cpp
//  Poligon
//
//  Created by Darius Buhai on 26/01/2019.
//  Copyright © 2019 Darius Buhai. All rights reserved.
//

#include <iostream>
#include <cstdio>

#define MAXC 60001
#define MAXN 801

using namespace std;

int n, m, nrin;
struct point{
    int x, y;
}p[MAXN], pint, pext;

bool verif_in(){
    int nrint = 0;
    for(int i=0;i<n;i++){
        point A = p[i], B = p[i+1];
        long long d1 = (pint.x*pext.y+pext.x*A.y+A.x*pint.y)-(A.x*pext.y+A.y*pint.x+pint.y*pext.x);
        long long d2 = (pint.x*pext.y+pext.x*B.y+B.x*pint.y)-(B.x*pext.y+B.y*pint.x+pint.y*pext.x);
        if(d1*d2<0) nrint++;
    }
    return (bool)nrint%2;
}

int main() {
    freopen("poligon.in", "r", stdin);
    freopen("poligon.out", "w", stdout);
    pext = {MAXC, MAXC};
    scanf("%d %d\n", &n, &m);
    for(int i=0;i<n;i++){
        scanf("%d %d\n", &p[i].x, &p[i].y);
        if(p[i].x<pext.x) pext.x = p[i].x;
        if(p[i].y<pext.y) pext.y = p[i].y;
    }
    p[n] = p[0];
    pext.x--;pext.y--;
    for(int i=0;i<m;i++){
        scanf("%d %d\n", &pint.x, &pint.y);
        if(verif_in())
            nrin++;
    }
    printf("%d\n", nrin);
    return 0;
}