[Programmers] Lv1: 없는 숫자 더하기(86051)

문제

- 링크: https://school.programmers.co.kr/learn/courses/30/lessons/86051?language=java

 

풀이

class Solution {
    public int solution(int[] numbers) {
        int answer = 0;
        for (int i = 0; i < 10; ++i) {
            boolean include = false;
            for (int j = 0; j < numbers.length; ++j) {
                if (numbers[j] == i) {
                    include = true;
                }
            }
            
            if (!include) {
                answer += i;
            }
        }
        return answer;
    }
}