이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
using namespace std;
#define int long long
int32_t main()
{
ios_base::sync_with_stdio(false); cin.tie(0);
int n, m; cin>>n>>m;
int val[n][m];
bool check[n][m];
for(int i=0; i<n; i++)
{
for(int l=0; l<m; l++)
cin>>val[i][l];
}
int k; cin>>k;
vector<vector<int>> groups;
vector<array<int, 2>> ind(k);
for(int i=0; i<k; i++)
{
cin>>ind[i][0]>>ind[i][1];
}
n--;
int ans=0, daa=0;
m--;
for(int i=0; i<(1<<(2*k)); i++)
{
int s=0;
int f=0;
for(int l=2*k-1, t=0; l>=0; l-=2, t++)
{
int x=ind[t][0];
int y=ind[t][1];
if(i&(1LL<<l))
{
if(i&(1LL<<(l-1)))
{
if(x>=1&&x<=n-1&&y>=1)
{
if(check[x][y]!=i&&check[x-1][y]!=i&&check[x+1][y]!=i&&check[x][y-1]!=i)
s+=val[x][y]+val[x-1][y]+val[x+1][y]+val[x][y-1];
else
f=1;
check[x][y]=check[x-1][y]=check[x+1][y]=check[x][y-1]=i;
}
else f=1;
}
else
{
if(x>=1&&x<=n-1&&y<=m-1)
{
if(check[x][y]!=i&&check[x-1][y]!=i&&check[x+1][y]!=i&&check[x][y+1]!=i)
s+=val[x][y]+val[x-1][y]+val[x+1][y]+val[x][y+1];
else
f=1;
check[x][y]=check[x-1][y]=check[x+1][y]=check[x][y+1]=i;
}
else
f=1;
}
}
else
{
if(i&(1LL<<(l+1)))
{
if(y>=1&&y<=m-1&&x>=1)
{
if(check[x][y]!=i&&check[x][y-1]!=i&&check[x][y+1]!=i&&check[x-1][y]!=i)
s+=val[x][y]+val[x][y-1]+val[x][y+1]+val[x-1][y];
else
f=1;
check[x][y]=check[x][y-1]=check[x][y+1]=check[x-1][y]=i;
}
else f=1;
}
else
{
if(y>=1&&y<=m-1&&x<=n-1)
{
if(check[x][y]!=i&&check[x][y-1]!=i&&check[x][y+1]!=i&&check[x+1][y]!=i)
s+=val[x][y]+val[x][y-1]+val[x][y+1]+val[x+1][y];
else
f=1;
check[x][y]=check[x][y-1]=check[x][y+1]=check[x+1][y]=i;
}
else f=1;
}
}
}
if(f==0) ans=max(ans, s), daa=1;
}
if(daa) cout<<ans;
else cout<<"NO\n";
}
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