[알고리즘문제풀기] 코드 처리하기

문제

내가 작성한 정답

class Solution {
    public String solution(String code) {
        StringBuilder sb = new StringBuilder();
        int mode = 0; 
        for (int i = 0; i < code.length(); i++) {
            char c = code.charAt(i);
            if (c == '1') { 
                mode = (mode == 0) ? 1 : 0;
                continue;
            }
            if (mode == 0 && i % 2 == 0) { 
                sb.append(c);
            } else if (mode == 1 && i % 2 == 1) { 
                sb.append(c);
            }
        }
        return sb.length() == 0 ? "EMPTY" : sb.toString();
    }
}

다른 사람들의 정답

class Solution {
    public String solution(String code) {
        StringBuilder answer = new StringBuilder();
        int mode = 0;
        for (int i = 0; i < code.length(); i++) {
            char current = code.charAt(i);
            if (current == '1') {
                mode = mode == 0 ? 1 : 0;
                continue;
            }

            if (i % 2 == mode) {
                answer.append(current);
            }
        }
        return answer.length() == 0 ? "EMPTY" : answer.toString();
    }
}