#include <bits/stdc++.h>
using namespace std;

#define rep(i, n) for (int i = 0; i < (int)n; i++)
using pii = pair<int, int>;
#define TMAX 100001

int main() {
  int n, m, k;
  cin >> n >> m >> k;
  vector<int> a(k);
  rep(i, k) {
    cin >> a[i];
    a[i]--;
  }
  vector<vector<int>> t(n, vector<int> (n));
  rep(i, n) rep(j, n)
    cin >> t[i][j];
  int ans = TMAX;
  rep(i, k) {
    auto dfs = [&](auto dfs, int s, int d, int ts, vector<bool> seen) {
      seen[s] = true;
      if (d == m) {
	ans = min(ts, ans);
	return;
      }
      rep(j, n) {
	if (seen[j])
	  continue;
	dfs(dfs, j, d + 1, ts + t[j][s], seen);
      }
    };
    vector<bool> seen(n, false);
    dfs(dfs, a[i], 1, 0, seen);
  }
  cout << ans << endl;
  return 0;
}