[프로그래머스] 행렬의 곱셈

matrix_multiplication_01.js

function solution(arr1, arr2) { 
    const m = arr1.length;
    const k = arr1[0].length;
    const n = arr2[0].length;
    
    let answer = [];
    
    for(let i = 0; i < m; i++){
        let temp = [];
        
        for(let j = 0; j < n; j++){
            let x = 0;
            
            for(let n = 0; n < k; n++){
                x += arr1[i][n] * arr2[n][j];
            }
            temp.push(x);
        }
        answer.push(temp);
    }
    
    return answer;
}