题解 | #明明的随机数#

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 in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        resolve2(in);
    }
    
    public static void resolve1(Scanner in) {
        TreeSet<Integer> sorter = new TreeSet<Integer>();
        while (in.hasNextInt()) {
            int counter = in.nextInt();
            while (counter > 0 && in.hasNextInt()) { // 注意 while 处理多个 case
                int a = in.nextInt();
                sorter.add(a);
                --counter;
            }
            
            for (Integer result : sorter) {
                System.out.println(result);
            }
            sorter.clear();
        }
    }
    
    public static void resolve2(Scanner in) {
        BitSet bs = new BitSet(1000);
        while (in.hasNextInt()) {
            int counter = in.nextInt();
            while (counter > 0 && in.hasNextInt()) { // 注意 while 处理多个 case
                int a = in.nextInt();
                bs.set(a);
                --counter;
            }
            
            for (int i = bs.nextSetBit(0); i >= 0; i = bs.nextSetBit(i+1)) {
                System.out.println(i);
            }
            bs.clear();
        }
    }
}