EmojiDetector

import java.math.BigInteger;
import java.util.LinkedHashMap;
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

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

        String initialLine = scanner.nextLine();

        String regExForDigits = "(?<digit>[\\d])";
        String regExForEmoji = "(?<emoji>([:]{2}|[*]{2})[A-Z][a-z]{2,}(\\2))";

        Pattern patternForDigits = Pattern.compile(regExForDigits);
        Matcher matcherForDigits = patternForDigits.matcher(initialLine);

        BigInteger bigIntegerCoolThreshold = new BigInteger("0");

        if (matcherForDigits.find()) {
            bigIntegerCoolThreshold = bigIntegerCoolThreshold
                    .add(new BigInteger(matcherForDigits.group("digit")));
            while (matcherForDigits.find()) {
                bigIntegerCoolThreshold = bigIntegerCoolThreshold
                        .multiply(new BigInteger(matcherForDigits.group("digit")));
            }
        }

        LinkedHashMap<String, String> mapListOfEmojiAndCoolnessCheck = new LinkedHashMap<>();

        Pattern patternForEmoji = Pattern.compile(regExForEmoji);
        Matcher matcherForEmoji = patternForEmoji.matcher(initialLine);

        while (matcherForEmoji.find()) {
            String emojiToAdd = matcherForEmoji.group("emoji");

            BigInteger currentEmojiCoolness = new BigInteger("0");
            for (int i = 2; i < emojiToAdd.length() - 2; i++) {
                int charValueToAdd = emojiToAdd.charAt(i);
                currentEmojiCoolness = currentEmojiCoolness.add(new BigInteger("" + charValueToAdd));
            }

            if (currentEmojiCoolness.compareTo(bigIntegerCoolThreshold) >= 0) {
                String isCoolEmoji = "yes";
                mapListOfEmojiAndCoolnessCheck.put(emojiToAdd, isCoolEmoji);
            } else {
                String isCoolEmoji = "no";
                mapListOfEmojiAndCoolnessCheck.put(emojiToAdd, isCoolEmoji);
            }
        }

        System.out.println("Cool threshold: " + bigIntegerCoolThreshold);

        System.out.println(String.format("%d emojis found in the text. The cool ones are:",
                mapListOfEmojiAndCoolnessCheck.size()));
        mapListOfEmojiAndCoolnessCheck
                .entrySet()
                .stream()
                .filter(e -> e.getValue().equals("yes"))
                .forEach(e -> System.out.println(e.getKey()));
    }
}