#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); i++)
using namespace std;
typedef long long ll;
#define chmin(x,y) x=min(x,y)

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);

    int N; cin >> N;
    vector<vector<int>> c(N, vector<int>(N));
    rep(i,N)rep(j,N) cin >> c[i][j];

    vector<vector<vector<int>>> dp(1<<N, vector<vector<int>>(1<<N, vector<int>(N, 1e9)));
    rep(i,N) dp[0][1<<i][i] = 0;
    rep(i,1<<N)rep(j,(1<<N)-1)rep(k,N){
        if(dp[i][j][k] == (int)1e9) continue;

        rep(l,N){
            if(!(j >> l & 1) && i >> k & 1){
                int j2 = j | (1 << l);
                chmin(dp[i][j2][l], dp[i][j][k] + c[k][l]);
            }else if(!(j >> l & 1)){
                int i2 = i | (1 << k);
                int j2 = (j | (1 << l)) ^ (1 << k);
                chmin(dp[i2][j2][l], dp[i][j][k] + c[k][l]);
            }
        }
    }

    int ans = 1e9;
    rep(i,1<<N)rep(j,N) chmin(ans, dp[i][(1<<N) - 1][j]);
    cout << ans << '\n';
}