Ranking

import java.util.*;

public class Ranking {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        Map<String, String> passwordMap = new LinkedHashMap<>();
        Map<String, Map<String, Integer>> userPointMap = new TreeMap<>();

        String input = scanner.nextLine();

        while (!"end of contests".equals(input)) {
            String[] element = input.split(":");
            String contest = element[0];
            String password = element[1];

            passwordMap.putIfAbsent(contest, password);

            input = scanner.nextLine();
        }

        input = scanner.nextLine();
        while (!"end of submissions".equals(input)) {
            String[] element = input.split("=>");
            String contest = element[0];
            String password = element[1];
            String name = element[2];
            int points = Integer.parseInt(element[3]);

            if (passwordMap.containsKey(contest) && passwordMap.containsValue(password)) {
                userPointMap.putIfAbsent(name, new LinkedHashMap<>());
                Map<String, Integer> contestAndPoints = userPointMap.get(name);
                contestAndPoints.putIfAbsent(contest, 0);

                if (points > userPointMap.get(name).get(contest)) {
                    contestAndPoints.put(contest, points);
                }
            }

            input = scanner.nextLine();
        }

        int bestSum = 0;
        for (Map.Entry<String, Map<String, Integer>> bestUser : userPointMap.entrySet()) {
            int sum = bestUser.getValue().values().stream().mapToInt(u -> u).sum();
            if (sum > bestSum) {
                bestSum = sum;
            }
        }

        for (Map.Entry<String, Map<String, Integer>> bestUser : userPointMap.entrySet()) {
            if (bestUser.getValue()
                    .values()
                    .stream()
                    .mapToInt(u -> u)
                    .sum() == bestSum) {
                System.out.printf("Best candidate is %s with total %d points.%n",
                        bestUser.getKey(), bestSum);
            }
        }

        System.out.println("Ranking: ");
        userPointMap
                .forEach((key, value) -> {
                    System.out.printf("%s%n", key);
                    value.entrySet()
                            .stream()
                            .sorted((c, p) -> p.getValue() - c.getValue())
                            .forEach(u -> System.out.printf("#  %s -> %d%n", u.getKey(), u.getValue()));
                });
    }
}