题解 | #记票统计#

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);
        TreeMap<String,Integer> map=new TreeMap<String,Integer>();
        int n1,n2 ;
        int sum=0;
        n1=in.nextInt();
        in.nextLine();
        String[] str1=in.nextLine().split(" ");
        n2=in.nextInt();
        in.nextLine();
        String[] str2=in.nextLine().split(" ");
        for (int i = 0; i < n1; i++) {
            map.put(str1[i],0);
        }
        for (int i = 0; i < n2; i++) {
            if (map.containsKey(str2[i])){
                map.put(str2[i],map.get(str2[i])+1 );
            }
            else {
                sum++;
            }

        }
        for (int i = 0; i < n1; i++) {
            System.out.println(str1[i]+" : "+map.get(str1[i]));
        }
        System.out.println("Invalid : "+sum);
    }
}