#region Header
#!/usr/bin/env python3
# from typing import *

import sys
import io
import math
import collections
import decimal
import itertools
import bisect
import heapq


def input():
    return sys.stdin.readline()[:-1]


# sys.setrecursionlimit(1000000)
#endregion

# _INPUT = """# paste here...
# """
# sys.stdin = io.StringIO(_INPUT)


def main():
    N = int(input())
    X = [list(map(int, input().split())) for _ in range(N)]
    Dependant = [[j for j in range(N) if X[i][j] == 1] for i in range(N)]
    A = list(map(int, input().split()))

    dp = [10**10] * (1<<N)
    dp[0] = 0

    for s in range(1<<N):
        if dp[s] == 10**10:
            continue
        for i in range(N):
            if s & (1<<i):
                continue
            v = dp[s]
            s1 = s | (1<<i)
            for j in Dependant[i]:
                if not(s & (1<<j)):
                    v += A[j]
                    s1 |= (1<<j)
            dp[s1] = min(dp[s1], v)

    ans = dp[(1<<N)-1]
    print(ans)


if __name__ == '__main__':
    main()