MLE，这内存限制也太小了吧，怎么改才能符合内存限制呢？

#include<bits/stdc++.h>
using namespace std;
const int maxn=2000+1;
int n,m;
int a[maxn][maxn],v[maxn][maxn];
int dfs(int x,int y,int p)
{
	if(a[x][y]>p)
	{
		a[x][y]=min(a[x][y],p);
	}
	else if(v[x][y]==1)	return 0;
	v[x][y]=1;
	if(x+1<=n)
	{
		dfs(x+1,y,p+1);
	}
	if(y+1<=m)
	{
		dfs(x,y+1,p+1);
	}
	if(x-1>=1)
	{
		dfs(x-1,y,p+1);
	}
	if(y-1>=1)
	{
		dfs(x,y-1,p+1);
	}
}
int main()
{
	freopen("input.txt","r",stdin); 
	freopen("output.txt","w",stdout);
	cin>>n>>m;
	int k;
	cin>>k;
	memset(a,10000,sizeof(a));
	for(int i=1;i<=k;i++)
	{
		memset(v,0,sizeof(v));
		int x,y;
		cin>>x>>y;
		dfs(x,y,0);
	}
	/*for(int i=1;i<=n;i++)
	{
		for(int j=1;j<=m;j++)
		{
			cout<<a[i][j]<<" ";
		}
		cout<<endl;
	}*/
	int maxx=-1,sx,sy;
	for(int i=1;i<=n;i++)
	{
		for(int j=1;j<=m;j++)
		{
			if(a[i][j]>maxx)
			{
				maxx=a[i][j];sx=i;sy=j;
			}
		}
	}
	cout<<sx<<" "<<sy<<endl;
	return 0;
}

求助各位大佬