new file: P11964.cpp

P11964.cpp

@@ -0,0 +1,41 @@
+#include <cstdio>
+#include <vector>
+#include <cstring>
+using namespace std;
+bool vis[510][25];
+int n, m, k;
+vector<int> g[510];
+void dfs(int now, int dep)
+{
+    if (vis[now][dep])
+        return;
+    vis[now][dep] = 1;
+    if (dep == k)
+        return;
+    for (int i = 0; i < g[now].size(); i++)
+        dfs(g[now][i], dep + 1);
+}
+int main()
+{
+    scanf("%d%d%d", &n, &m, &k);
+    for (int j = 0; j < m; j++)
+    {
+        int u, v;
+        scanf("%d%d", &u, &v);
+        g[u].push_back(v), g[v].push_back(u);
+    }
+    for (int i = 1; i <= n; i++)
+    {
+        memset(vis, 0, sizeof vis);
+        dfs(i, 0);
+        for (int dep = 1; dep <= k; dep++)
+        {
+            int ans = 0;
+            for (int now = 1; now <= n; now++)
+                ans += vis[now][dep];
+            printf("%d ", ans);
+        }
+        printf("\n");
+    }
+    return 0;
+}