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

int main() {
    int n;
    cin >> n;
    vector<vector<int>> x(n, vector<int>(n));
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            cin >> x.at(i).at(j);
        }
    }
    vector<int> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a.at(i);
    }

    int mini = 100000 * 18;
    for (int bit = 0; bit < (1 << n); bit++) {
        vector<bool> ok(n);
        bool update = true;
        while (update) {
            update = false;

            for (int i = 0; i < n; i++) {
                if (ok.at(i)) continue;

                bool all = true;
                for (int j = 0; j < n; j++) {
                    if (x.at(i).at(j) == 0) continue;

                    all &= (bool)(bit & (1 << j)) | ok.at(j);
                }

                if (all) {
                    update = true;
                    ok.at(i) = true;
                }
            }
        }

        bool all = true;
        for (int i = 0; i < n; i++) {
            all &= ok.at(i);
        }

        if (all) {
            int sum = 0;
            for (int i = 0; i < n; i++) {
                sum += a.at(i) * (bool)(bit & (1 << i));
            }
            mini = min(mini, sum);
        }
    }
    
    cout << mini << endl;
}