#include <stdio.h>
#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using namespace atcoder;
using mint = modint998244353;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000005
#define Inf64 4000000000000000001LL

int main(){
	
	int n,m,k;
	cin>>n>>m>>k;
	vector<int> a(k);
	rep(i,k){
		cin>>a[i];
		a[i]--;
	}
	vector t(n,vector<int>(n));
	rep(i,n){
		rep(j,n)cin>>t[i][j];
	}
	vector dp(1<<n,vector<int>(n,Inf32));
	rep(i,n){
		dp[1<<i][i] = 0;
	}
	rep(i,1<<n){
		rep(j,n){
			if(dp[i][j] == Inf32)continue;
			rep(l,n){
				if((i>>l)&1)continue;
				dp[i|(1<<l)][l] = min(dp[i|(1<<l)][l],dp[i][j]+t[j][l]);
			}
		}
	}
	int ans = Inf32;
	rep(i,k){
		rep(j,1<<n){
			if(__builtin_popcount(j)<m)continue;
			ans = min(ans,dp[j][a[i]]);
		}
	}
	cout<<ans<<endl;
	return 0;
}