OJ-Problems-Source/HDOJ/2339_autoAC.cpp

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#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;
const int maxn = 505;
int G[maxn][maxn];
int vis[maxn][maxn];
int n, m, d;
const int dir[4][2] = {{0, -1}, {0, 1}, {-1, 0}, {1, 0}};
struct Node {
int x, y, v;
}node[maxn * maxn], q[maxn * maxn];
int cmp (const Node &a, const Node &b) {
return a.v > b.v;
}
int BFS (int k) {
int front , rear;
int cnt = 1;
front = 0;
rear = 1;
q[front] = node[k];
vis[node[k].x][node[k].y] = node[k].v;
bool flag = 1;
while (front < rear) {
for (int i = 0; i < 4; i++) {
int newx = q[front].x + dir[i][0];
int newy = q[front].y + dir[i][1];
if (newx < 0 || newx >= n || newy < 0 || newy >= m)
continue;
if (G[newx][newy] > node[k].v) {
flag = 0;
continue;
}
if (vis[newx][newy] == node[k].v || node[k].v - G[newx][newy] >= d)
continue;
vis[newx][newy] = node[k].v;
if (G[newx][newy] == node[k].v)
cnt++;
else
G[newx][newy] = node[k].v;
q[rear].x = newx;
q[rear++].y = newy;
}
front++;
}
if (flag)
return cnt;
return 0;
}
int main () {
int T;
scanf ("%d", &T);
while (T--) {
scanf ("%d%d%d", &n, &m, &d);
int cnt = 0;
for (int i = 0; i < n; i++)
for (int j = 0; j < m; j++) {
scanf ("%d", &G[i][j]);
node[cnt].x = i;
node[cnt].y = j;
node[cnt++].v = G[i][j];
}
sort (node, node + cnt, cmp);
memset (vis, -1, sizeof (vis));
int ans = 0;
for (int i = 0; i < cnt; i++) {
if (vis[node[i].x][node[i].y] == -1) {
ans += BFS(i);
}
}
printf ("%d\n", ans);
}
return 0;
}