[알고리즘문제풀기] 문자열 겹쳐쓰기

문제

내가 작성한 정답

class Solution {
    public String solution(String my_string, String overwrite_string, int s) {
        StringBuilder sb = new StringBuilder();
        for(int i=0; i<s; i++){
            sb.append(my_string.charAt(i));
        }
        sb.append(overwrite_string);
        for(int i = s+overwrite_string.length(); i<my_string.length(); i++) {
            sb.append(my_string.charAt(i));
        }
        return sb.toString();
    }
}

이전에 작성한 정답

class Solution {
    public String solution(String my_string, String overwrite_string, int s) {
        int cnt = overwrite_string.length();
        char[] answer = my_string.toCharArray();
        for(int i=s; i<s+cnt; i++){
            answer[i] = overwrite_string.charAt(i-s);
        }
        //return String.valueOf(answer);
        return new String(answer);
    }
}