[프로그래머스] 369게임

import java.util.stream.*;

class Solution {
    public int solution(int order) {
        int answer = 0;
        int[] digits = Stream.of(String.valueOf(order).split(""))
            .mapToInt(Integer::parseInt)
            .toArray();
        for (int i = 0; i < digits.length; i++) {
            if (digits[i] % 3 == 0 && digits[i] != 0) answer++;
        }
        return answer;
    }
}