更新

作业/刘航宇-day42/第一题/P2857.java

@@ -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();
+    }
+}

作业/刘航宇-day42/第三题/P2840.java

@@ -0,0 +1,17 @@
+import java.util.*;
+
+public class P2840 {
+    public static void main(String[] args) {
+        Scanner in = new Scanner(System.in);
+        List<Integer> nums = new ArrayList<>();
+        while (in.hasNextInt()) nums.add(in.nextInt());
+        Collections.sort(nums);
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < nums.size(); i++) {
+            if (i > 0) sb.append(' ');
+            sb.append(nums.get(i));
+        }
+        System.out.println(sb.toString());
+        in.close();
+    }
+}

作业/刘航宇-day42/第二题/P1098.java

@@ -0,0 +1,25 @@
+import java.util.*;
+
+public class P1098 {
+    public static void main(String[] args) {
+        Scanner in = new Scanner(System.in);
+        List<Integer> a = new ArrayList<>();
+        while (in.hasNextInt()) a.add(in.nextInt());
+        StringBuilder first = new StringBuilder();
+        StringBuilder second = new StringBuilder();
+        boolean f = true;
+        for (int i = 0; i < a.size(); i++) {
+            if ((i & 1) == 0) {
+                if (!f) first.append(' ');
+                first.append(a.get(i));
+                f = false;
+            } else {
+                if (second.length() > 0) second.append(' ');
+                second.append(a.get(i));
+            }
+        }
+        System.out.println(first.toString());
+        System.out.println(second.toString());
+        in.close();
+    }
+}