#include <algorithm>
#include <bitset>
#include <cassert>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <list>
#include <map>
#include <queue>
#include <set>
#include <string>
#include <sstream>
#include <vector>
#include <complex>
#include <ctime>
#include <stack>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef vector<int> VI;
typedef vector< VI > VVI;
typedef pair<int, int> PII;
typedef vector<PII> VPII;

#define REP(i, n) for(int i = 0; i < (n); ++i)
#define RREP(i, n) for(int i = (n) - 1; i >= 0; --i)
#define FOR(i, x, y) for(int i = (x); i <= (y); ++i)
#define RFOR(i, x, y) for(int i = (x); i >= (y); --i)
#define SZ(a) (int)(a).size()
#define ALL(a) (a).begin(),(a).end()
#define SORT(a) sort(ALL(a))
#define CLEAR(x) memset(x, 0, sizeof x);
#define COPY(FROM, TO) memcpy(TO, FROM, sizeof TO);
#define UNIQUE(c) SORT(c),(c).resize(unique(ALL(c))-(c).begin())
#define pb push_back
#define mk make_pair
#define sqr(x) ((x)*(x))
#define X first
#define Y second
const long double pi=acos(-1.0);
const double EPS = 1E-5;
const int INF = 2 * (1e+9) + 1;
const int NMAX = 32000;
const int MOD = 1e+25;

int n, k;
int a[13][13];
ll dp[1<<13][13];
int main () {
	/*freopen("ladder.in", "r" ,stdin);
	freopen("ladder.out", "w", stdout);*/
	cin >> n;
  REP (i, n) REP (j, n) cin >> a[i][j];
  FOR (mask, 1, 1<<13) {
    REP (i, 13) {
      if (mask & (1<<i)) {
        int cur = (mask ^ (1<<i));
        ll minn = INF;
        REP (j, 13)
          if (cur & (1<<j))
            minn = min (minn, dp[cur][j] + a[i][j]);
        dp[mask][i] = minn;
      }
    }
  }
  int minn = INF;
  REP (i, 13)
    minn = dp[(1<<13) - 1][i];
  cout << minn;
	return 0;
}
/*
5
0 183 163 173 181
183 0 165 172 171
163 165 0 189 302
173 172 189 0 167
181 171 302 167 0
*/