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;
typedef long long ll;
typedef long double ld;
#define endl '\n'
#define pb push_back
#define mk make_pair
#define sz size()
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define kill(x) return cout << x << endl, void();
#define int ll
typedef pair <int, int> pii;
#pragma GCC optimize ("O3")
#pragma GCC optimize ("unroll-loops")
#pragma GCC target ("avx2")
const int N = 1e6 + 5;
const int MOD = 998244353, INF = 2e9, MOD2 = 1e9 + 7, sq = 350;
int dx[8] = {0, 0, 1, -1, -1, -1, 1, 1}, dy[8] = {-1, 1, 0, 0, -1, 1, 1, -1}, vis[N];
vector <int> a[N], mrk[N], adj[N];
int ans, mn, few, n, m;
bool val (int x, int y)
{
return 0 <= x && x < n && 0 <= y && y < m;
}
void wef (int x, int y, int q)
{
ans += a[x][y];
mrk[x][y] = 0;
a[x][y] = -INF;
for (int i = 0; i < 4; i++)
{
if (dx[i] == dx[q])
continue;
if (!val (x + dx[i], y + dy[i]))
{
ans += -INF;
continue;
}
ans += a[x + dx[i]][y + dy[i]];
a[x + dx[i]][y + dy[i]] = -INF;
}
}
void dfs (int v, int par)
{
vis[v] = 1;
int x = v / m, y = v % m;
for (int i = 0; i < 4; i++)
{
if (val (x + dx[i], y + dy[i]))
mn = min (mn, a[x + dx[i]][y + dy[i]]);
else
mn = -INF;
}
for (int u : adj[v])
{
if (u != par && !vis[u])
dfs (u, v);
else if (u != par)
few++;
}
}
void Solve ()
{
int k, x, y;
cin >> n >> m;
for (int i = 0; i < n; i++)
for (int j = 0; j < m; j++)
{
cin >> x;
a[i].pb (x);
mrk[i].pb (0);
}
cin >> k;
for (int i = 0; i < k; i++)
{
cin >> x >> y;
mrk[x][y] = 1;
}
for (int i = 0; i < n; i++)
for (int j = 0; j < m; j++)
for (int q = 0; q < 8; q++)
if (val (i + dx[q], j + dy[q]) && mrk[i][j] && mrk[i + dx[q]][j + dy[q]])
{
wef (i, j, q);
wef (i + dx[q], j + dy[q], (q + 2) % 4 + (q > 3 ? 4 : 0));
}
for (int i = 0; i < n; i++)
for (int j = 0; j < m; j++)
{
if (!mrk[i][j])
continue;
ans += a[i][j];
for (int q = 0; q < 4; q++)
{
if (val (i + dx[q], j + dy[q]))
ans += a[i + dx[q]][j + dy[q]];
else
ans += -INF;
}
if (val (i + 2, j) && mrk[i + 2][j])
{
int v = i * m + j, u = (i + 2) * m + j;
ans -= a[i + 1][j];
adj[v].pb (u);
adj[u].pb (v);
}
if (val (i, j + 2) && mrk[i][j + 2])
{
int v = i * m + j, u = i * m + j + 2;
ans -= a[i][j + 1];
adj[v].pb (u);
adj[u].pb (v);
}
}
for (int i = 0; i < n; i++)
for (int j = 0; j < m; j++)
{
if (!mrk[i][j])
continue;
int v = i * m + j;
if (vis[v])
continue;
mn = INF, few = 0;
dfs (v, -1);
if (few > 1)
kill ("No");
if (few == 0)
ans -= mn;
}
if (ans < 0)
kill ("No");
cout << ans << endl;
}
int32_t main ()
{
ios::sync_with_stdio (0), cin.tie (0), cout.tie (0);
int tt = 1;
// cin >> tt;
while (tt--)
Solve ();
}
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