题解 | 机器翻译

import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        int m,n;
        Queue<Integer> queue = new LinkedList<>();
        m = in.nextInt();
        n = in.nextInt();
        int ans = 0;
        while(n-->0){
            int temp = in.nextInt();
            if(!queue.contains(temp)){
                queue.offer(temp);
                if(queue.size()>m)queue.poll();
                ans++;
            }
        }
        System.out.println(ans);
    }
}