更新

2025-12-28 21:05:06 +08:00
parent 5d09b15326
commit bdaedc135e
46 changed files with 485 additions and 38 deletions
@@ -0,0 +1,41 @@
+import java.util.Scanner;
+
+public class P2857 {
+    public static void main(String[] args) {
+        Scanner in = new Scanner(System.in);
+        int n = in.nextInt();
+        int[] mention = new int[101];
+        boolean[][] by = new boolean[101][101];
+        for (int i = 0; i < n; i++) {
+            int sender = in.nextInt();
+            int k = in.nextInt();
+            for (int j = 0; j < k; j++) {
+                int id = in.nextInt();
+                if (id >= 0 && id <= 100) {
+                    mention[id]++;
+                    if (sender >= 0 && sender <= 100) by[id][sender] = true;
+                }
+            }
+        }
+        int bestId = 0;
+        int bestCount = -1;
+        for (int id = 0; id <= 100; id++) {
+            if (mention[id] > bestCount) {
+                bestCount = mention[id];
+                bestId = id;
+            }
+        }
+        System.out.println(bestId);
+        StringBuilder sb = new StringBuilder();
+        boolean first = true;
+        for (int s = 0; s <= 100; s++) {
+            if (by[bestId][s]) {
+                if (!first) sb.append(' ');
+                sb.append(s);
+                first = false;
+            }
+        }
+        System.out.println(sb.toString());
+        in.close();
+    }
+}