题解 | #整型数组合并#

import java.util.*;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        while (scanner.hasNext()) {
            TreeSet<Integer> integers = new TreeSet<>();
            int i = scanner.nextInt();
            for (int i1 = 0; i1 < i; i1++) {
                integers.add(scanner.nextInt());
            }
            int i1 = scanner.nextInt();
            for (int i2 = 0; i2 < i1; i2++) {

                integers.add(scanner.nextInt());
            }
            StringBuilder stringBuilder = new StringBuilder();
            integers.forEach(stringBuilder::append);
            System.out.println(stringBuilder.toString());

        }
    }
}