题解 | #小乐乐查找数字#

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);
        int n = in.nextInt();
        ArrayList<Integer> list = new ArrayList<>();
        for(int i = 0;i < n;i++){
            list.add(in.nextInt());
        }
        int x = in.nextInt();
        System.out.println(Collections.frequency(list,x));
    }
    
}