P1596 [USACO10OCT]Lake Counting S

R52232058

Luogu/problem/P1596/P1596.cpp

@@ -0,0 +1,42 @@
+#include <bits/stdc++.h>
+
+using namespace std;
+
+int n, m, ans;
+char c;
+bool w[105][105];
+
+void dfs(int x, int y) {
+    if (x < 0 || x >= n || y < 0 || y >= m || !w[x][y]) {
+        return;
+    }
+    w[x][y] = false;
+    dfs(x - 1, y - 1);
+    dfs(x - 1, y);
+    dfs(x - 1, y + 1);
+    dfs(x, y - 1);
+    dfs(x, y + 1);
+    dfs(x + 1, y - 1);
+    dfs(x + 1, y);
+    dfs(x + 1, y + 1);
+}
+
+int main() {
+    cin >> n >> m;
+    for (int i = 0; i < n; i++) {
+        for (int j = 0; j < m; j++) {
+            cin >> c;
+            w[i][j] = c == 'W' ? true : false;
+        }
+    }
+    for (int i = 0; i < n; i++) {
+        for (int j = 0; j < m; j++) {
+            if (w[i][j]) {
+                dfs(i, j);
+                ans++;
+            }
+        }
+    }
+    cout << ans << endl;
+    return 0;
+}