import java.util.Scanner;
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);
        // 注意 hasNext 和 hasNextLine 的区别
        LinkedHashMap<String, Integer> map = new LinkedHashMap<>();
        while (in.hasNextLine()) { // 注意 while 处理多个 case
            String line = in.nextLine();

            String[] f = line.split(" ")[0].split("\\\\");
            String file = f[f.length - 1];
            if (file.length() > 16) file = file.substring(file.length() - 16);
            String rn = line.split(" ")[1];
            String key = file + " " + rn;
            map.put(key, map.getOrDefault(key, 0)+1);
        }

        int count=0;
        for (String key : map.keySet()) {
            if(map.size()-count<=8)
            System.out.println(key.split(" ")[0] + " "
                               + key.split(" ")[1] + " " + map.get(key));
            count++;                               

        }


    }
}
  1. LinkedHashMap保证有序
  2. map.getOrDefault(key, 0)+1 别忘记+1;
  3. 注意,取最后8条记录的取法