[JAVA] 같은 숫자는 싫어 - level 1

 

import java.util.*;

public class Solution {
    public int[] solution(int []arr) {
        StringBuilder temp = new StringBuilder();
        StringBuilder res = new StringBuilder();
        for (int i : arr) {
            temp.append(String.valueOf(i));
        }

        // 중복 제거
        for (int i = 0; i < temp.length(); i++) {
            if ((i != temp.length() - 1) && (temp.charAt(i) != temp.charAt(i + 1))) {
                res.append(temp.charAt(i));
            } else if (i == temp.length() - 1) {
                res.append(temp.charAt(i));
            }
        }

        int[] answer = new int[res.length()];

        for (int i=0; i<res.length(); i++) {
            answer[i] = Character.getNumericValue(res.charAt(i));
        }

        return answer;
    }
}