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 re = new Scanner(System.in);
        TreeSet<Integer> st = new TreeSet<>();
        int n = re.nextInt();
        for (int i = 0; i < n; i++) {
            st.add(re.nextInt());
        }
        n = re.nextInt();
        for (int i = 0; i < n; i++) {
            st.add(re.nextInt());
        }
        for (int e : st) {
            System.out.print(e);
        }
    }
}