题解 | #明明的随机数#
明明的随机数
https://www.nowcoder.com/practice/3245215fffb84b7b81285493eae92ff0
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 sc = new Scanner(System.in); int first = sc.nextInt(); Map<Integer, Integer> map = new HashMap<>(); List<Integer> list = new ArrayList<>(); while (sc.hasNextInt()) { int temp = sc.nextInt(); map.put(temp,map.getOrDefault(temp,0)+1); } for(Map.Entry<Integer,Integer> entry : map.entrySet()) { list.add(entry.getKey()); } Collections.sort(list); for (int i : list) { System.out.println(i); } } }
使用hash表来保存状态