#include<bits/stdc++.h>
#define REP(i,n) for(int i=0,i##_len=(n);i<i##_len;++i)
#define rep(i,a,b) for(int i=int(a);i<int(b);++i)
#define All(x) (x).begin(),(x).end()
using namespace std;
using ll = long long;
using Graph =vector<vector<int>>;
void visit(const Graph &g, int v, vector< vector<int> >& scc,
    stack<int> &S, vector<bool> &inS,
    vector<int> &low, vector<int> &num, int& time) {
  low[v] = num[v] = ++time;
  S.push(v); inS[v] = true;
  for(auto e: g[v]) {
    int w = e;
    if (num[w] == 0) {
      visit(g, w, scc, S, inS, low, num, time);
      low[v] = min(low[v], low[w]);
    } else if (inS[w])
      low[v] = min(low[v], num[w]);
  }
  if (low[v] == num[v]) {
    scc.push_back(vector<int>());
    while (1) {
      int w = S.top(); S.pop(); inS[w] = false;
      scc.back().push_back(w);
      if (v == w) break;
    }
  }
}
void stronglyConnectedComponents(const Graph& g,
    vector< vector<int> >& scc) {
  const int n = g.size();
  vector<int> num(n), low(n);
  stack<int> S;
  vector<bool> inS(n);
  int time = 0;
  REP(u, n) if (num[u] == 0)
    visit(g, u, scc, S, inS, low, num, time);
}

int main(){
    int N;cin>>N;
    vector<vector<int>> X(N,vector<int>(N)),graph(N);
    REP(i,N) REP(j,N){
        cin>>X[i][j];
        if(X[i][j]) graph[i].push_back(j);
    }
    vector<int> A(N);
    REP(i, N){
        cin >> A[i];
    }
    int ans=INT_MAX;
    vector<vector<int>> scc;
    stronglyConnectedComponents(graph,scc);
    vector<vector<bool>> B(N,vector<bool>(N,false));
    
    REP(bit,1<<N){
        int res=0;
        REP(j,N) if(bit>>j&1){
            res+=A[j];
        }
        bool flag=true;
        REP(i,N) if(~bit>>i&1){
            rep(j,i+1,N) if((~bit>>j&1)&&X[i][j]){
                if(X[j][i]) flag=false;
            }
        }
        REP(i,scc.size()){
            bool ok=false;
            for(auto e:scc[i]){
                if(bit>>e&1) ok=true;
            }
            if(!ok) flag=false;
        }
        if(flag) ans=min(ans,res);
    }
    cout<<ans<<endl;
}