0分求调！！！

#include<bits/stdc++.h>
#define int long long
#define endl "\n"
#define jiasu ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define jdsr for(int i=0;i<n;i++)  cin>>a[i];
#define jdsc for(int i=0;i<n;i++)  cout<<a[i]<<" ";
using namespace std;
struct node{
	int x,y;
}; 
int n,m,k,s;
node a[105],b[105];
bool vis[105][105];
signed main(){
//    freopen(".in","r",stdin);
//    freopen(".out","w",stdout);
	jiasu;
	cin>>n>>m>>k;
	for(int i=1;i<=m;i++){
		cin>>a[i].x>>a[i].y;
		int x1=a[i].x+2,y1=a[i].y+2;
		vis[x1][y1]=1;
		vis[x1-1][y1-1]=1;
		vis[x1-1][y1]=1;
		vis[x1-1][y1+1]=1;
		vis[x1][y1-1]=1;
		vis[x1][y1+1]=1;
		vis[x1+1][y1-1]=1;
		vis[x1+1][y1]=1;
		vis[x1+1][y1+1]=1;
		vis[x1-2][y1]=1;
		vis[x1][y1-2]=1;
		vis[x1][y1+2]=1;
		vis[x1+2][y1]=1;
	} 
	for(int i=1;i<=k;i++){
		cin>>b[i].x>>b[i].y;
		int x1=b[i].x+2,y1=b[i].y+2;
		vis[x1][y1]=1;
		vis[x1-1][y1-1]=1;
		vis[x1-1][y1]=1;
		vis[x1-1][y1+1]=1;
		vis[x1][y1-1]=1;
		vis[x1][y1+1]=1;
		vis[x1+1][y1-1]=1;
		vis[x1+1][y1]=1;
		vis[x1+1][y1+1]=1;
		vis[x1-2][y1]=1;
		vis[x1][y1-2]=1;
		vis[x1][y1+2]=1;
		vis[x1+2][y1]=1;
		vis[x1-2][y1-2]=1;
		vis[x1][y1-1]=1;
		vis[x1-2][y1+1]=1;
		vis[x1-2][y1+2]=1;
		vis[x1-1][y1-2]=1;
		vis[x1-1][y1-1]=1;
		vis[x1-1][y1+1]=1;
		vis[x1-1][y1+2]=1;
		vis[x1+2][y1-2]=1;
		vis[x1+2][y1-1]=1;
		vis[x1+2][y1+1]=1;
		vis[x1+2][y1+2]=1;
		vis[x1+1][y1-2]=1;
		vis[x1+1][y1-1]=1;
		vis[x1+1][y1+1]=1;
		vis[x1+1][y1+2]=1;
	}
	for(int i=1;i<=n;i++){
		for(int j=1;j<=n;j++){
			if(vis[i][j]==0){
				s++;
			}
		}
	}
	cout<<s;
	return 0;
}