お仕事の依頼です。

適当につくってみました。

package main;

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

public class Main {

	private static final String FILENAME = "game_data.txt";

	public static void main(String[] args) {
		try {
			execute();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	private static void execute() throws IOException {
		Map<String, Integer> pointMap = new HashMap<String, Integer>();
		Map<String, Integer> diffMap = new HashMap<String, Integer>();

		BufferedReader reader = new BufferedReader(new FileReader(FILENAME));

		try {
			String line = reader.readLine();
			int teamNum = Integer.parseInt(line);

			for (int i = 0; i < teamNum; i++) {
				String teamName = reader.readLine();
				pointMap.put(teamName, 0);
				diffMap.put(teamName, 0);
			}

			while ((line = reader.readLine()) != null) {
				String[] data = line.split(" ");
				String team1 = data[0];
				int goal1 = Integer.parseInt(data[1]);
				int goal2 = Integer.parseInt(data[2]);
				String team2 = data[3];

				if (goal1 > goal2) {
					int team1Point = pointMap.get(team1);
					pointMap.put(team1, team1Point + 3);
					int team1diff = diffMap.get(team1);
					diffMap.put(team1, team1diff + (goal1 - goal2));
				} else if (goal1 == goal2) {
					int team1Point = pointMap.get(team1);
					pointMap.put(team1, team1Point + 1);
					int team1diff = diffMap.get(team1);
					diffMap.put(team1, team1diff + (goal1 - goal2));
					int team2Point = pointMap.get(team2);
					pointMap.put(team2, team2Point + 1);
					int team2diff = diffMap.get(team2);
					diffMap.put(team2, team2diff + (goal2 - goal1));
				} else {
					int team2Point = pointMap.get(team2);
					pointMap.put(team2, team2Point + 3);
					int team2diff = diffMap.get(team2);
					diffMap.put(team2, team2diff + (goal2 - goal1));
				}
			}
		} finally {
			reader.close();
		}

		int maxPoint = Collections.max(pointMap.values());

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

		for (String teamName : pointMap.keySet()) {
			int point = pointMap.get(teamName);
			if (point == maxPoint) {
				int diff = diffMap.get(teamName);
				maxPointTeamDiff.put(teamName, diff);
			}
		}

		int maxDiff = Collections.max(maxPointTeamDiff.values());

		for (String teamName : maxPointTeamDiff.keySet()) {
			int diff = maxPointTeamDiff.get(teamName);
			if (diff == maxDiff) {
				System.out.println(teamName);
				break;
			}
		}
	}
}

結果：

風組

「得失点差」というのが、勝ったときだけなのか負けたときにもつくのかよくわかりませんでした。

ちょこっと変えればいいだけのはなしなんですが。