MOBA Chalenger

package AssociativeArraysExercise;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;

public class MOBAChallenger {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        Map<String, Map<String, Integer>> playersByPositionBySkill = new HashMap<>();
        Map<String, Integer> totalSkill = new HashMap<>();

        String line = reader.readLine();

        while (!line.equals("Season end")){
            if (line.contains(" -> ")){
                String[] tokens = line.split(" -> ");
                String player = tokens[0];
                String position = tokens[1];
                int skill = Integer.parseInt(tokens[2]);

                playersByPositionBySkill.putIfAbsent(player, new HashMap<>());
                if (!playersByPositionBySkill.get(player).containsKey(position)){
                    playersByPositionBySkill.get(player).put(position,skill);
                    totalSkill.put(player,skill);

                } else {
                    if (playersByPositionBySkill.get(player).get(position) < skill){
                        playersByPositionBySkill.get(player).put(position,skill);
                    }
                    totalSkill.put(player, totalSkill.get(player) + skill);
                }

            } else if (line.contains("vs")){
                String[] tokens = line.split(" vs ");
                String playerOne = tokens[0];
                String playerTwo = tokens[1];

                if (playersByPositionBySkill.containsKey(playerOne) && playersByPositionBySkill.containsKey(playerTwo)){
                    if (totalSkill.get(playerOne).equals(totalSkill.get(playerTwo))){
                        if (totalSkill.get(playerOne) < totalSkill.get(playerTwo)){
                            totalSkill.remove(playerOne);
                        } else {
                            totalSkill.remove(playerTwo);
                        }
                    }
                }

            }

            line  = reader.readLine();
        }



    }
}