import com.opencsv.CSVReader;
import org.apache.commons.lang3.StringUtils;

import java.io.FileReader;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class Main {

    public static void main(String[] args) {
        HashMap<String, Integer> map = new HashMap<>();
        int j = 0;
        try {
            for (int i = 0; i < 55; ++i) {
                CSVReader reader = new CSVReader(new FileReader("./plik.csv"), ';');
                String[] nextLine;
                reader.readNext();

                while ((nextLine = reader.readNext()) != null) {
                    String[] person = nextLine[i].split("/");
                    if (person[0].equals("") || person[0].equals(" ")) {
                        break;
                    }
                    String key = StringUtils.substringBetween(nextLine[i], ".", "/");
                    Integer num = map.getOrDefault(key, 0);
                    map.put(key, num + Integer.parseInt(person[1]));
                }

                reader.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        System.out.println(map.size());
        map.entrySet().stream()
                .sorted(Map.Entry.comparingByValue())
                .forEach(System.out::println);
    }
}