N,M,K=map(int,input().split())
A=list(map(int,input().split()))
for i in range(K):A[i]-=1

T=[list(map(int,input().split()))for i in range(N)]

import itertools

ans=10**18

for p in itertools.permutations(range(N),M):

    c=0

    for i in range(M-1):
        c+=T[p[i]][p[i+1]]
    
    mn=10**18

    for i in A:
        mn=min(mn,T[p[-1]][i])
    
    ans=min(ans,mn+c)

print(ans)