#include <algorithm>
#include <vector>
#include <iostream>

using namespace std;

#include "matrix.h"

main (void)
{
  Tmatrix m;
  Trow r;
  r.push_back(2);
  r.push_back(3);
  m.push_back(r);
  cout << m;
  r = 2*r+r;
  m.push_back(r);
  cout << m;
  swap(m[0],m[1]);
  cout << m;
}