행렬의 덧셈 - 1단계 (C++)

#include <string>
#include <vector>

using namespace std;

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