#include <algorithm>
#include <vector>
#include <iostream>
#include <math.h>

using namespace std;

#include "matrix.h"

bool
eliminate (Tmatrix & m)
{

  return true;
}

void
backsubstitute (Tmatrix & m, Trow & sol)
{

}

bool
gauss (Tmatrix & m, Trow & sol)
{
  if (eliminate (m)) {
    backsubstitute (m, sol);
    return true;
  }
  else
    return false;
}

main (void)
{
  Tmatrix m;
  Trow sol;
  readmatrix (cin, m);
//  cout << m;
  if (gauss (m, sol)) {
    cout << sol;
  }
  else
    cout << "No unique solution.\n";
}