C++ (코딩테스트) - 행렬의 곱셈(프로그래머스)

문제

https://school.programmers.co.kr/learn/courses/30/lessons/12949

프로그래머스

 

나의 풀이

 

#include <string>
#include <vector>

using namespace std;

vector<vector<int>> solution(vector<vector<int>> arr1, vector<vector<int>> arr2) {
    vector<vector<int>> answer(arr1.size(), vector<int>(arr2[0].size(), 0));    
    for (int row = 0; row < answer.size(); row++)   
        for (int col = 0; col < answer[0].size(); col++)        
            for (int i = 0; i < arr1[0].size(); i++)            
                answer[row][col] += arr1[row][i] * arr2[i][col];        
    return answer;
}