$2.$ $$q_k =2$$，将题意描述的要被遮蔽的点挨个将其记录为被遮蔽即可。
# AC Code
```cpp
#include<bits/stdc++.h>
#define int long long
#define ull unsigned long long
#define N 510
using namespace std;
inline long long read()
{
long long x=0,f=1;char ch=getchar();
while (ch<'0'||ch>'9'){if (ch=='-') f=-1;ch=getchar();}
while (ch>='0'&&ch<='9'){x=x*10+ch-48;ch=getchar();}
return x*f;
}
int a[N][N],n,m,q,vis[N][N];
signed main(){
n=read();m=read();q=read();
while(q--)
{
int op,x,y,c;
op=read();
if(op==1)
{
x=read();y=read();c=read();
if(vis[x][y]!=-1) a[x][y]=c;
if(vis[x+1][y]!=-1) a[x+1][y]=c;
if(vis[x][y+1]!=-1) a[x][y+1]=c;
if(vis[x+1][y+1]!=-1) a[x+1][y+1]=c;
}
else
{
x=read();y=read();
vis[x][y]=vis[x+1][y]=vis[x][y+1]=vis[x+1][y+1]=-1;
}
}
for(int i=1;i<=n;i++)
{
for(int j=1;j<=m;j++)
{
printf("%lld ",a[i][j]);
}
printf("\n");
}
return 0;
}
```