class Matrix {
public:
    vector<vector<int>> a;
    
    Matrix operator+(const Matrix& other) {
        Matrix result;
        int n = a.size();
        int m = a[0].size();
        
        for (int i = 0; i < n; i++) {
            vector<int> row;
            for (int j = 0; j < m; j++) {
                row.push_back(a[i][j] + other.a[i][j]);
            }
            result.a.push_back(row);
        }
        
        return result;
    }
};