[Programmers] Lv.0 / qr code / Java

문제

 

풀이

class Solution {
    public String solution(int q, int r, String code) {
        String answer = "";
        for(int i = 0; i < code.length(); i++) {
            if(i % q == r) {
                answer += code.charAt(i);
            }
        }
        return answer;
    }
}

class Solution {
    public String solution(int q, int r, String code) {
        StringBuilder sb = new StringBuilder();
        for(int i = r; i < code.length(); i += q) {
            sb.append(code.charAt(i));
        }
        return sb.toString();
    }
}

 

출처

https://school.programmers.co.kr/learn/courses/30/lessons/181903