#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,m,k,ans=0;
	cin>>n>>m>>k;
	int s[n+5][n+5];
	for(int i=1;i<=n;i++)
		for(int j=1;j<=n;j++)
			s[i][j]=0;
	for(int i=1;i<=m;i++){
		int x,y;
		cin>>x>>y;
		s[x][y]=1;
		s[x][y-1]=1;
		s[x][y-2]=1;
		s[x][y+1]=1;
		s[x][y+2]=1;
		s[x+1][y]=1;
		s[x+2][y]=1;
		s[x-1][y]=1;
		s[x-2][y]=1;
		s[x+1][y-1]=1;
		s[x-1][y-1]=1;
		s[x+1][y+1]=1;
		s[x-1][y+1]=1;
	}
	for(int i=1;i<=k;i++){
		int x,y;
		cin>>x>>y;
		s[x][y]=1;
		s[x][y-1]=1;
		s[x][y-2]=1;
		s[x][y+1]=1;
		s[x][y+2]=1;
		s[x+1][y]=1;
		s[x+2][y]=1;
		s[x-1][y]=1;
		s[x-2][y]=1;
		s[x+1][y-1]=1;
		s[x-1][y-1]=1;
		s[x+1][y+1]=1;
		s[x-1][y+1]=1;
		s[x+2][y-1]=1;
		s[x+2][y-2]=1;
		s[x+1][y-2]=1;
		s[x+2][y+2]=1;
		s[x+2][y+1]=1;
		s[x+1][y+2]=1;
		s[x-1][y-2]=1;
		s[x-2][y-1]=1;
		s[x-2][y-2]=1;
		s[x-1][y+2]=1;
		s[x-2][y+2]=1;
		s[x-2][y+1]=1;
	}
	for(int i=1;i<=n;i++)
		for(int j=1;j<=n;j++)
			if(s[i][j]==0)
				ans++;
	cout<<ans;
	return 0;
}

感觉太长了