N = int(input())
X = [[int(x) for x in input().split()] for _ in range(N)]
A = [int(a) for a in input().split()]

par = [set([]) for _ in range(N)]
for i in range(N):
    for j in range(N):
        if X[i][j] == 1:
            par[i].add(j)

dp = [-1]*(2**N)
dp[-1] = 1
def f(n):
    if dp[n] >= 0:
        return dp[n]
    S = set([])
    for j in range(N):
        if n & (1<<j):
            S.add(j)
    for i in range(N):
        if par[i] <= S:
            S.add(i)
    m = 0
    for j in range(N):
        if j in S:
            m += 1<<j
    if m == n:
        dp[n] = 0
    else:
        dp[n] = f(m)
    return dp[n]

ans = sum(A)
for i in range(2**N-1, -1, -1):
    if f(i) <= 0:
        continue
    cnt = 0
    for j in range(N):
        if i & (1<<j):
            cnt += A[j]
    ans = min(ans, cnt)

print(ans)