행렬의 곱셈

https://school.programmers.co.kr/learn/courses/30/lessons/12949?language=java

class Solution {
    public int[][] solution(int[][] arr1, int[][] arr2) {
        int[][] answer = new int[arr1.length][arr2[0].length];

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

단순한 행렬의 곱셈