N = int(input())
X = tuple(tuple(map(int, input().split())) for _ in range(N))
Y = [0] * N
for i, x in enumerate(X):
    for j, xj in enumerate(x):
        if xj:
            Y[i] += 1 << j
A = tuple(map(int, input().split()))

dp = [0] * (1 << N)
for S in range(1 << N):
    for i, a in enumerate(A):
        if (S >> i) & 1:
            dp[S] += a

for S in range(1 << N):
    for i, T in enumerate(Y):
        if S - T == S ^ T:
            dp[S | (1 << i)] = min(dp[S], dp[S | (1 << i)])
print(dp[(1<<N)-1])