this：

#include<bits/stdc++.h>
using namespace std;

int m,k,n;

int a[110][110];

int cnt;

int main(){
    
    cin>>n>>m>>k;
    
    for(int i=1;i<=m;i++)
    {
        int x,y;
        cin>>x>>y;
        if(x-1>=1)a[x-1][y]=1;
        if(x-2>=1)a[x-2][y]=1;
        
        if(y-1>=1)a[x][y-1]=1;
        if(y-2>=1)a[x][y-2]=1;
        
        a[x][y]=1;
        
        if(y+2>=1)a[x][y+2]=1;
        if(y+1>=1)a[x][y+1]=1;
        
        if(x+2>=1)a[x+2][y]=1;
        if(x+1>=1)a[x+1][y]=1;
        
        if(x-1>=1 && y-1>=1)a[x-1][y-1]=1;
		if(x-1>=1 && y+1>=1)a[x-1][y+1]=1;
	    if(x+1>=1 && y-1>=1)a[x+1][y-1]=1;
		if(x+1>=1 && y+1>=1)a[x+1][y+1]=1;
    }
    
    for(int i=0;i<k;i++)
    {
        int x,y;
        cin>>x>>y; 
        
        for(int j=min(1,x-2);j<=x+2;j++)
            for(int k=min(1,y-2);k<=y+2;k++)
                a[j][k]=1;
        
    }
    
    for(int i=1;i<=n;i++)
        for(int j=1;j<=n;j++)
            if(!a[i][j])cnt+=1;
   
    
    cout<<cnt;
    
    return 0;
}