#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n,f,s;
	cin>>n>>f>>s;
	int a[n+1][n+1];
	for(int i=1;i<=f;i++)//读入火把 
	{
		int x,y;
		cin>>x>>y;
		a[x][y]=1;
		a[x-1][y]=a[x-2][y]=a[x+1][y]=a[x+2][y]=1;
		a[x][y-1]=a[x][y-2]=a[x][y+1]=a[x][y+2]=1;
		a[x-1][y-1]=a[x-1][y+1]=a[x+1][y-1]=a[x+1][y+1]=1;
	}
	for(int i=1;i<=s;i++)//读入萤石 
	{
		int x,y;
		cin>>x>>y;
		a[x][y]=1;
		a[x-1][y]=a[x-2][y]=a[x+1][y]=a[x+2][y]=1;
		a[x][y+1]=a[x][y+2]=a[x][y-1]=a[x][y-2]=1;
		a[x-1][y-1]=a[x-1][y-2]=a[x-2][y-1]=a[x-2][y-2]=1;
		a[x+1][y-1]=a[x+1][y-2]=a[x+2][y-1]=a[x+2][y-2]=1;
		a[x-1][y+1]=a[x-2][y+1]=a[x-1][y+2]=a[x-2][y+2]=1;
		a[x+1][y+1]=a[x+1][y+2]=a[x+2][y+1]=a[x+2][y+2]=1;
	}
	int ans;
	for(int x=1;x<=n;x++)
	{
		for(int y=1;y<=n;y++)
		{
			if(a[x][y]!=1)ans++;
		}
	}
	cout<<ans;
	return 0;
} 

结果全部错了，AW，全红婵