#include <bits/stdc++.h>

using namespace std;

class InParser {
private:
	FILE *fin;
	char *buff;
	int sp;

	char read_ch() {
		++sp;
		if (sp == 4096) {
			sp = 0;
			fread(buff, 1, 4096, fin);
		}
		return buff[sp];
	}

public:
	InParser(const char* nume) {
		fin = fopen(nume, "r");
		buff = new char[4096]();
		sp = 4095;
	}

	InParser& operator >> (int &n) {
		char c;
		while (!isdigit(c = read_ch()) && c != '-');
		int sgn = 1;
		if (c == '-') {
			n = 0;
			sgn = -1;
		} else {
			n = c - '0';
		}
		while (isdigit(c = read_ch())) {
			n = 10 * n + c - '0';
		}
		n *= sgn;
		return *this;
	}

	InParser& operator >> (long long &n) {
		char c;
		n = 0;
		while (!isdigit(c = read_ch()) && c != '-');
		long long sgn = 1;
		if (c == '-') {
			n = 0;
			sgn = -1;
		} else {
			n = c - '0';
		}
		while (isdigit(c = read_ch())) {
			n = 10 * n + c - '0';
		}
		n *= sgn;
		return *this;
	}
};

class OutParser {
private:
    FILE *fout;
    char *buff;
    int sp;

    void write_ch(char ch) {
        if (sp == 50000) {
            fwrite(buff, 1, 50000, fout);
            sp = 0;
            buff[sp++] = ch;
        } else {
            buff[sp++] = ch;
        }
    }


public:
    OutParser(const char* name) {
        fout = fopen(name, "w");
        buff = new char[50000]();
        sp = 0;
    }
    ~OutParser() {
        fwrite(buff, 1, sp, fout);
        fclose(fout);
    }

    OutParser& operator << (int vu32) {
        if (vu32 <= 9) {
            write_ch(vu32 + '0');
        } else {
            (*this) << (vu32 / 10);
            write_ch(vu32 % 10 + '0');
        }
        return *this;
    }

    OutParser& operator << (long long vu64) {
        if (vu64 <= 9) {
            write_ch(vu64 + '0');
        } else {
            (*this) << (vu64 / 10);
            write_ch(vu64 % 10 + '0');
        }
        return *this;
    }

    OutParser& operator << (char ch) {
        write_ch(ch);
        return *this;
    }
    OutParser& operator << (const char *ch) {
        while (*ch) {
            write_ch(*ch);
            ++ch;
        }
        return *this;
    }
};

#define int long long


InParser in("poligon.in");
OutParser out("poligon.out");
int n, m, ans;
pair<int, int> v[805];

int det(int x1, int y1, int x2, int y2, int x3, int y3)
{
    return (x2 - x1) * (y3 - y1) - (y2 - y1) * (x3 - x1);
}

int pctseg(int x1, int y1, int x2, int y2, int x3, int y3)
{
    int d = det(x1, y1, x2, y2, x3, y3);

    if(d == 0 && x3 >= min(x1, x2) && x3 <= max(x1, x2) && y3 >= min(y1, y2) && y3 <= max(y1, y2))
    {
        return 1;
    }

    return 0;
}

signed main()
{
    in>>n>>m;

    for(int i = 1; i<=n; i++)
    {
        in>>v[i].first>>v[i].second;
    }

    v[0] = v[n];

    long long x, y, xv, yv, inter, d1, d2, d3, d4;
    while(m--)
    {
        in>>x>>y;

        xv = 69696;
        yv = 71717;

        inter = 0;

        for(int i = 0; i<n; i++)
        {
            d1 = det(v[i].first, v[i].second, v[i + 1].first, v[i + 1].second, x, y);
            d2 = det(v[i].first, v[i].second, v[i + 1].first, v[i + 1].second, xv, yv);
            d3 = det(x, y, xv, yv, v[i].first, v[i].second);
            d4 = det(x, y, xv, yv, v[i + 1].first, v[i + 1].second);


            if(d1 * d2 < 0 && d3 * d4 < 0)
            {
                inter++;
            }
        }

        if(inter % 2 == 1)
        {
            ans++;
        }
    }

    out<<ans;

    return 0;
}