코딩 테스트 - 행렬의 곱셈

package programmers;

import java.util.Arrays;

public class 행렬의곱셈_221221 {

    public static void main(String[] args) {

       

        int [][] arr1 = {{1,4}, {3,2}, {4,1}};

        int [][] arr2 = {{3,3}, {3,3}};

        solution(arr1, arr2);

    }

    public static int[][] solution(int[][] arr1, int[][] arr2) {

        //https://mathbang.net/562 이걸 보고 구현하면 된다... ★

        //3중 for문~~

        int[][] answer = new int[arr1.length][arr2[0].length];

        for(int i = 0; i < answer.length; i++){

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

                for(int k = 0; k < arr1[0].length; k++){

                    answer[i][j] += arr1[i][k] * arr2[k][j];

                }

            }

        }

        for(int [] i : answer){

            System.out.println(Arrays.toString(i));

        }

        return answer;

    }

}