/*

                         YATIN KWATRA        _03_08_14


Let's Hoop..



           o
 /|   o         o
 \|=--            o
    ##
                    \\
                 /   \O
                O_/   T
                T    /|
                |\  | |
 _______________|_|________

------------------------------------------------

o- - -  \o          __|
   o/   /|          vv`\
  /|     |              |
   |    / \_            |
  / \   |               |
 /  |                   |


------------------------------------------------

HOOPER_4_LYF..

*/

// AC BAKSHI RABBA

// #pragma GCC optimize "trapv"

#include <bits/stdc++.h>
#define ll                      long long
#define ld                      long double
#define ull                     unsigned long long
#define FIO                     ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define endl                    "\n"
#define fo(i,a,b)               for(int i = a; i<=b ; i++)
#define rfo(i,a,b)              for(int i = a; i>=b ; i--)
#define vii                     vector<int>
#define vll                     vector<ll>
#define pq                      priority_queue
#define uom                     unordered_map
#define all(v)                  v.begin(),v.end()
#define mp                      make_pair
#define pb                      push_back
#define pob                     pop_back
#define ff                      first
#define ss                      second
#define pii                     pair<int,int>
#define pll                     pair<ll,ll>
#define mll                     map<ll,ll>
#define mii                     map<int,int>
#define vvii                    vector<vii>
#define vvll                    vector<vll>
#define mod                     1000000007
#define MIN                     -1e9
#define pi                      3.1415926535897932384626433832795

using namespace std;

void INPUT()
{
#ifndef ONLINE_JUDGE
  freopen("input.txt", "r", stdin);
  freopen("output.txt", "w", stdout);
#endif
}

/*
----------------------------------------------------------------

   -> Check For Overflows
   -> Out of Bounds
   -> Initialisations of global arrays and variables
   -> Read the Question and the sample test cases carefully
   -> Its not Always Complex, Try to simplify
   -> write it down and try to solve
   -> Have Faith in urself and in ur approach
   -> If it seems totally out of reach, switch to next :)
   -> And Come Back later, if possible ..

----------------------------------------------------------------*/

const int N = 22;

ll dp[N][1 << N];

bool comp[N][N];

ll n;

ll f(int pos , int mask)
{

  if (pos == n and !mask) return 1;
  if (pos == n or !mask) return 0;

  if (dp[pos][mask] != -1) return dp[pos][mask];

  ll cur = 0;
  ll ans = 0;

  fo(i, 0, n - 1)
  {
    cur = 0;

    if (mask & (1 << i) and comp[pos][i]) cur = f(pos + 1, mask ^ (1 << i));
    ans += cur;
    ans %= mod;
  }

  return dp[pos][mask] = ans;
}
void solve()
{
  cin >> n;

  fo(i, 0, n - 1)
  {
    fo(j, 0, n - 1) cin >> comp[i][j];
  }

  memset(dp, -1, sizeof(dp));

  cout << f(0, (1 << n) - 1) << endl;


}

int main() {

  FIO
  INPUT();

  int t;
  t = 1;
// cin >> t;

  fo(i, 0, t - 1)
  {
    solve();
  }
  return 0;
}

Measured memory_bytes: 724520