import sys
input = sys.stdin.readline

N=int(input())

X=[set() for i in range(N)]

for i in range(N):
    L=list(map(int,input().split()))
    
    for j in range(N):
        if L[j]==1:
            X[i].add(j)
        
A=list(map(int,input().split()))

ANS=1<<60

for i in range(1<<N):
    SET=set()
    
    for j in range(N):
        if i & (1<<j) !=0:
            SET.add(j)

    for renew in range(N):
        for j in range(N):
            if X[j] <= SET:
                SET.add(j)

    if len(SET)==N:
        ANS=min(ANS,sum([A[j] for j in range(N) if i & (1<<j) !=0]))
        
print(ANS)