N = int(input())
X = [list(map(int,input().split())) for i in range(N)]
A = list(map(int,input().split()))
INF = 1 << 60
dp = [INF] * (1 << N)
dp[0] = 0

for status in range(1 << N):
    for target in range(N):
        if (status >> target) & 1:
            continue
        cost = 0
        for i in range(N):
            if (X[target][i] == 1) and (status >> i) & 1 == 0: # 頼りにしている人が自白していない
                cost = A[target] # うそをつく必要がある
        next_status = status | (1 << target)
        dp[next_status] = min(dp[next_status], dp[status] + cost)
        
print(dp[-1])