题解 | 记票统计

import java.util.Scanner;
import java.util.HashMap;
import java.util.LinkedHashMap;

// 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 n = sc.nextInt();
        HashMap<String, Integer>map = new LinkedHashMap<>();//这样才能有序输出

        for (int i = 0; i < n; i++) {
            map.put(sc.next(), 0);
        }
        int m = sc.nextInt();
        int Invalid = 0;
        for (int i = 0; i < m; i++) {
            String key = sc.next();
            if (map.containsKey(key)) {
                map.put(key, map.get(key) + 1);
            } else {
                Invalid++;
            }
        }
        for (String key : map.keySet()) {
            System.out.println(key + " : " + map.get(key));
        }
        //System.out.println(map);
        System.out.println("Invalid" + " : " + Invalid);


    }
}