[알고리즘문제풀기] 영어가 싫어요

문제

내가 작성한 정답

class Solution {
    public long solution(String numbers) {
        String answer = numbers
                .replaceAll("zero","0").replaceAll("one","1")
                .replaceAll("two","2").replaceAll("three","3")
                .replaceAll("four","4").replaceAll("five","5")
                .replaceAll("six","6").replaceAll("seven","7")
                .replaceAll("eight","8").replaceAll("nine","9");

        return Long.parseLong(answer);
    }
}

다른 사람들의 정답

class Solution {
    public long solution(String numbers) {

            String[] numbers_arr = {"zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"};

            for (int i = 0; i < numbers_arr.length; i++) {
                numbers = numbers.replaceAll(numbers_arr[i], String.valueOf(i));
            }

            long answer = Long.parseLong(numbers);
            return answer;
        }
}

import java.util.Map;

class Solution {
    private static final Map<String, Integer> CONTAINS = Map.of("zero", 0, "one", 1, "two", 2,"three", 3, "four", 4, "five", 5, "six", 6, "seven", 7, "eight", 8, "nine", 9);
    public long solution(String numbers) {
        StringBuilder answer = new StringBuilder();
        StringBuilder builder = new StringBuilder();
        for (String s : numbers.split("")) {
            builder.append(s);
            if (CONTAINS.containsKey(builder.toString())) {
                answer.append(CONTAINS.get(builder.toString()));
                builder = new StringBuilder();
            }
        }
        return Long.parseLong(answer.toString());
    }
}