import sys

sys.setrecursionlimit(10**6)
int1 = lambda x: int(x)-1
p2D = lambda x: print(*x, sep="\n")
def II(): return int(sys.stdin.buffer.readline())
def LI(): return list(map(int, sys.stdin.buffer.readline().split()))
def LI1(): return list(map(int1, sys.stdin.buffer.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def LLI1(rows_number): return [LI1() for _ in range(rows_number)]
def BI(): return sys.stdin.buffer.readline().rstrip()
def SI(): return sys.stdin.buffer.readline().rstrip().decode()
# dij = [(0, 1), (-1, 0), (0, -1), (1, 0)]
# dij = [(0, 1), (-1, 0), (0, -1), (1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)]
dij = [(0, 1), (1, 0), (1, 1), (1, -1)]
inf = 10**19
# md = 998244353
md = 10**9+7

n = II()
to = [[] for _ in range(n)]
indeg0 = [0]*n
for u in range(n):
    for v, b in enumerate(LI()):
        if b:
            to[v].append(u)
            indeg0[u] += 1
aa = LI()

alone=[u for u in range(n) if indeg0[u]==0]
union=[u for u in range(n) if indeg0[u]]

ans = inf
for bit in range(1 << n):
    score = 0
    fin = [False]*n
    stack = []
    for u in alone:
        fin[u]=True
        stack.append(u)
    for u in union:
        if bit >> u & 1:
            score += aa[u]
            stack.append(u)
    if score >= ans: continue

    indeg=indeg0[:]
    while stack:
        u = stack.pop()
        for v in to[u]:
            if fin[v]: continue
            indeg[v] -= 1
            if indeg[v] == 0:
                fin[v] = True
                stack.append(v)

    if sum(fin) == n: ans = score

print(ans)