[Level 1, C++] 행렬의 덧셈

#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> temp;
        for(int u=0; u<arr1[0].size(); u++) {
            temp.push_back(arr1[i][u] + arr2[i][u]);
        }
        answer.push_back(temp);
    }
    return answer;
}