[LEVEL 1] 행렬의 덧셈

문제

 

 

 

답

 

• 이중 for문 사용

 

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