int배열 두 배 만들기

class Solution {
    public int[] solution(int[] numbers) {
        int[] answer = new int[numbers.length];

        for(int i = 0; i < numbers.length; i++) {
            answer[i] = numbers[i] * 2;
        }
        
        return answer;
    }
}

class Solution {
    public int[] solution(int[] numbers) {
        for(int i=0; i<numbers.length; i++) numbers[i] *=2;
        return numbers;
    }
}