/**
 *    author:  math2do
 *    created: 24.01.2020 02:17:03
**/

#include <bits/stdc++.h>

using namespace std;

template <typename A, typename B>
string to_string(pair<A, B> p);
 
template <typename A, typename B, typename C>
string to_string(tuple<A, B, C> p);
 
template <typename A, typename B, typename C, typename D>
string to_string(tuple<A, B, C, D> p);
 
string to_string(const string& s) {
  return '"' + s + '"';
}
 
string to_string(const char* s) {
  return to_string((string) s);
}
 
string to_string(bool b) {
  return (b ? "1" : "0");
}
string to_string(const char &ch) {
  return string(1, ch);
}
 
string to_string(vector<bool> v) {
  bool first = true;
  string res = "{";
  for (int i = 0; i < static_cast<int>(v.size()); i++) {
    if (!first) {
      res += ", ";
    }
    first = false;
    res += to_string(v[i]);
  }
  res += "}";
  return res;
}
 
template <size_t N>
string to_string(bitset<N> v) {
  string res = "";
  for (size_t i = 0; i < N; i++) {
    res += static_cast<char>('0' + v[i]);
  }
  reverse(res.begin(), res.end());
  return res;
}

template <typename A>
string to_string(A v) {
  bool first = true;
  string res = "{";
  for (const auto &x : v) {
    if (!first) {
      res += ", ";
    }
    first = false;
    res += to_string(x);
  }
  res += "}";
  return res;
}
 
template <typename A, typename B>
string to_string(pair<A, B> p) {
  return "(" + to_string(p.first) + ", " + to_string(p.second) + ")";
}
 
template <typename A, typename B, typename C>
string to_string(tuple<A, B, C> p) {
  return "(" + to_string(get<0>(p)) + ", " + to_string(get<1>(p)) + ", " + to_string(get<2>(p)) + ")";
}
 
template <typename A, typename B, typename C, typename D>
string to_string(tuple<A, B, C, D> p) {
  return "(" + to_string(get<0>(p)) + ", " + to_string(get<1>(p)) + ", " + to_string(get<2>(p)) + ", " + to_string(get<3>(p)) + ")";
}

//..import matrix, queue, stack

void debug_out() { cerr << endl; }
 
template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
  cerr << " " << to_string(H);
  debug_out(T...);
}
 
#ifdef LOCAL
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#else
#define debug(...) 42
#endif


const int mod = (int) (1e9 + 7);

inline void add(int &a, int b) {
  a += b;
  if (a >= mod) {
    a -= mod;
  }
}

vector <vector <int>> dp;

int solve(int y, int mask, vector <vector <int>> &mat, int n) {
  if (y == n) return 1;

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

  int ans = 0;
  for (int i = 0; i < n; i++) {
    if (mat[i][y] == 1 && ((mask & (1 << i)) == 0)) {
      mask ^= (1 << i);
      int ret = solve(y + 1, mask, mat, n);
      add(ans, ret);
      mask ^= (1 << i);
    } 
  }

  return dp[y][mask] = ans;     
}

int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  int n;
  cin >> n;
  vector <vector <int>> mat(n, vector <int>(n));
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < n; j++) {
      cin >> mat[i][j];
    } 
  }
  dp.resize(n);
  for (int i = 0; i < n; i++) {
    int total = (1 << n);
    dp[i].resize(total);
    fill(dp[i].begin(), dp[i].end(), -1);
  } 

  int mask = 0;
  int ans = solve(0, mask, mat, n);
  cout << ans << '\n';
  return 0;
}


Measured memory_bytes: 172416