N = int(input())
X = [list(map(int,input().split())) for _ in range(N)]
A = list(map(int,input().split()))
G = [[] for _ in range(N)]
Gnum = [0] * N
for i in range(N):
    for j in range(N):
        if X[i][j]:
            G[j].append(i)
            Gnum[i] += 1
ans = 10 ** 8
for bit in range(1 << N):
    num = Gnum.copy()
    stack = []
    count = 0
    _sum = 0
    for i in range(N):
        if bit & (1 << i):
            _sum += A[i]
            stack.append(i)
            count += 1
            num[i] = 0
        else:
            if Gnum[i] == 0:
                stack.append(i)
                count += 1
    while stack:
        now = stack.pop()
        for v in G[now]:
            num[v] -= 1
            if num[v] == 0:
                stack.append(v)
                count += 1
    if count == N:
        if _sum <= ans:
            ans = _sum
print(ans)