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): # 次に自白させたい人
    if (status >> target) & 1:
      continue # 自白済み。
#   print(bin(status)[2:].zfill(3),"から",bin(1 << target)[2:].zfill(3),"を自白させたい")
    # X[target]が1の人が自白済みでなければコストが掛かる
    cost = 0
    next_status = status | (1 << target)
    for i in range(N):
      if X[target][i] == 1 and (status >> i) & 1 == 0: # 信頼している人が自白していない
        # iの人が自白したと嘘をつく
#       print(i,"が自白したと嘘をつく",A[i])
        next_status |= (1 << i)
        cost += A[i]
#   print("cost",cost,"が発生")
    if dp[next_status] > dp[status] + cost:
      dp[next_status] = dp[status] + cost
      
print(dp[-1])