from itertools import permutations


N, M, K = map(int, input().split())
A = set(map(lambda x: int(x) - 1, input().split()))
T = [list(map(int, input().split())) for _ in range(N)]

ans = 10 ** 18

for p in permutations(range(N), M):
    if p[-1] not in A:
        continue
    ans = min(ans, sum(T[p[i]][p[i+1]] for i in range(M-1)))

print(ans)