Population Counter [Mimi][JA]

import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Scanner;
import java.util.stream.Collectors;

public class _10_PopulationCounter {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        // Country=>    City,   Population
        Map<String, Map<String, Long>> countries = new LinkedHashMap<>();

        String input = "";
        while (!"report".equals(input = sc.nextLine())) {
            String[] data = input.split("\\|");

            countries.putIfAbsent(data[1], new LinkedHashMap<>());
            Map<String, Long> cities = countries.get(data[1]);
            cities.putIfAbsent(data[0], 0L);
            cities.put(data[0], cities.get(data[0]) + Long.parseLong(data[2]));
        }

        countries
                .entrySet()
                .stream()
                .sorted((p1, p2) -> {
                    long pop1 = p1.getValue()
                            .values()
                            .stream()
                            .mapToLong(Long::valueOf)
                            .sum();
                    long pop2 = p2.getValue()
                            .values()
                            .stream()
                            .mapToLong(Long::valueOf)
                            .sum();
                    return Long.compare(pop2, pop1);
                })
                .forEach(e -> {
                    long pop = e.getValue().values().stream().mapToLong(Long::longValue).sum();
                    System.out.println(String.format("%s (total population: %d)", e.getKey(), pop));

                    Map<String, Long> sortedCities = e.getValue()
                            .entrySet()
                            .stream()
                            .sorted((c1, c2) -> Long.compare(c2.getValue(), c1.getValue()))
                            .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue, (a, b) -> a, LinkedHashMap::new));
                    sortedCities.forEach((key, value) -> System.out.println(String.format("=>%s: %d", key, value)));
                });
    }
}