[프로그래머스][Java] 행렬의 덧셈

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class Solution { public int[][] solution(int[][] arr1, int[][] arr2) { int[][] answer = {}; answer = new int[arr1.length][arr1[0].length]; for(int i = 0; i < arr1.length; i++) { for(int j = 0 ; j<arr1[0].length; j++) { answer[i][j] = arr1[i][j] + arr2[i][j]; } } return answer; } }