N,M,K=map(int, input().split())
A=list(map(int, input().split()))

C=[]
for i in range(N):
  T=list(map(int, input().split()))
  C.append(T)
  
import itertools
E=list(itertools.permutations([i for i in range(N)],M))
ans=10**25
for e in E:
  t=0
  for j in range(len(e)-1):
    t+=C[e[j]][e[j+1]]
  la=e[-1]
  for a in A:
    ans=min(ans,t+C[la][a-1])
print(ans)