프로그래머스 - 행렬의 덧셈

class Solution {
    public int[][] solution(int[][] arr1, int[][] arr2) {
        int[][] answer = {};

        answer = new int[arr1.length][arr1[0].length];

        for (int i = 0; i < answer.length; i++) {
            for (int j = 0; j < answer[i].length; j++) {
                answer[i][j] = arr1[i][j] + arr2[i][j];
            }
        }

        return answer;
    }
}