#include <bits/stdc++.h>
using namespace std;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
 
    int N; cin >> N;
    vector<vector<int>> D(N,vector<int>(N));
    for(auto &h : D) for(auto &w : h) cin >> w;

    int n2 = 1<<N;
    vector<vector<int>> dp(n2,vector<int>(N,1001001001));
    dp.at(1).at(0) = 0;
    for(int i=2; i<n2; i++) for(int k=0; k<N; k++) if(i&(1<<k)){
        for(int l=0; l<N; l++) if(i&(1<<k)){
            if(k == l) continue;
            int cost = dp.at(i-(1<<k)).at(l);
            cost += D.at(l).at(k)*(N-__popcount(i-(1<<k)));
            dp.at(i).at(k) = min(dp.at(i).at(k),cost);
        }
    }

    cout << *min_element(dp.at(n2-1).begin(),dp.at(n2-1).end()) << endl;
}