Sample.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Sample {
    private static final String TOKEN = "?token=4YSXKTZXTEWAW1AD3DTJTJX5HNY9AF5O";
    private static final String ENTER = "https://game.coderunner.jp/enter"
	    + TOKEN;
    private static final String INFO = "https://game.coderunner.jp/info"
	    + TOKEN;

    public void solve() throws IOException {
	int cnt = 0;
	while (true) {

	    String[] result = query(INFO).split(" ");
	    if (!isNumber(result[0])) {
		query(ENTER);
		cnt = 0;
		continue;
	    }

	    long rest = 0;

	    // パース
	    long maxHP = 0;
	    System.out.println();
	    long power = Long.parseLong(result[0]);
	    long frontHP = Long.parseLong(result[2]);
	    long frontBase = Long.parseLong(result[3]);
	    int N = Integer.parseInt(result[4]);
	    long player1 = Long.parseLong(result[1]);
	    long player2 = Long.parseLong(result[N + 7]);
	    long player3 = Long.parseLong(result[N + 10]);

	    System.out.println(String.format("%1$,3d", player1) + " "
		    + String.format("%1$,3d", player2) + " "
		    + String.format("%1$,3d", player3));
	    System.out.println(String.format("%1$,3d", frontHP) + " "
		    + String.format("%1$,3d", frontBase));
	    System.out.println(String.format("%1$,3d", power));

	    // 自分の順位
	    int rank = 0;
	    if (player1 < player2) {
		rank++;
	    }
	    if (player1 < player3) {
		rank++;
	    }

	    long[] HPs = new long[N];
	    for (int i = 0; i < N; i++) {
		HPs[i] = Long.parseLong(result[i + 5]);
		maxHP = Math.max(maxHP, HPs[i]);
		System.out.println(String.format("%1$,3d", HPs[i]));
	    }
	    maxHP = Math.max(maxHP, frontHP);

	    long point = Math.min(frontHP, power);
	    if (point > maxHP * 0.5
		    || (N <= 1 && power > frontHP * 0.6)
		    || maxHP * 5 < power
		    || (Math.max(player2, player3) + rest < player1 && cnt % 5 == 0)) {
		String attack = query(ENTER);
	    }
	    cnt++;

	    try {
		Thread.sleep(200L);
	    } catch (InterruptedException e) {
	    }
	}

    }

    private boolean isNumber(String val) {
	String regex = "\\A[-]?[0-9]+\\z";
	Pattern p = Pattern.compile(regex);
	Matcher m1 = p.matcher(val);
	return m1.find();
    }

    private String query(String _url) throws IOException {
	URL url = new URL(_url);
	HttpURLConnection connection = (HttpURLConnection) url.openConnection();
	connection.setRequestMethod("GET");
	if (connection.getResponseCode() == HttpURLConnection.HTTP_OK) {
	    InputStreamReader isr = new InputStreamReader(
		    connection.getInputStream(), StandardCharsets.UTF_8);
	    BufferedReader reader = new BufferedReader(isr);
	    String res = "";
	    String line = null;

	    while ((line = reader.readLine()) != null) {
		res += line + " ";
	    }
	    return res.trim();
	}
	return "";
    }

    public static void main(String[] args) throws IOException {
	new Sample().solve();
    }

}