50 50
75 71 23 37 28 23 69 75 5 62 3 11 96 100 13 50 57 51 8 90 4 6 84 27 11 89 95 81 10 62 48 52 69 87 97 95 30 74 21 42 36 64 31 80 81 50 56 53 33 99
26 30 5 33 35 29 6 15 36 17 32 16 14 1 29 34 22 40 12 42 38 48 39 50 13 47 18 43 10 8 49 45 11 31 21 37 46 28 20 41 2 7 9 24 27 23 3 44 15 14
 10 10
61 59 97 16 2 94 57 48 91 93
2 8 6 5 3 1 3 4 9 10
 2 1
1 2
1
 3 3
10 20 30
1 2 3
 50 60
86 57 45 93 17 12 40 10 47 80 18 80 3 9 6 55 13 99 5 76 4 70 100 55 27 91 71 3 65 93 41 74 80 56 90 50 58 13 71 9 47 52 26 73 72 21 15 81 88 28
40 32 5 16 49 23 3 17 14 10 1 15 1 21 28 22 13 45 12 25 44 48 46 32 36 43 11 8 49 7 7 35 10 14 39 4 42 10 30 27 1 17 31 15 8 41 44 33 25 26 19 18 29 37 50 6 36 38 47 9
 2 7
20 30
1 1 1 2 2 2 2
 2 2
10 12
2 1
 5 1
16 87 36 16 81
3
 2 3
20 30
1 1 1
 2 10
39 26
1 1 2 2 2 2 2 2 1 2

63929
 2137
 0
 40
 62514
 20
 12
 0
 0
 104

#include <bits/stdc++.h>
long long MOD = 1000000007;
using namespace std;
bool sortbysec(const pair<long long, long long> &a,
               const pair<long long, long long> &b) {
  return (a.second < b.second);
}
long long POW(long long a, long long b) {
  if (b == 0) return 1;
  if (b == 1) return a % MOD;
  long long temp = POW(a, b / 2);
  if (b % 2 == 0)
    return (temp * temp) % MOD;
  else
    return (((temp * temp) % MOD) * a) % MOD;
}
vector<char> capl = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I',
                     'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R',
                     'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'};
vector<char> sml = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i',
                    'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r',
                    's', 't', 'u', 'v', 'w', 'x', 'y', 'z'};
int main() {
  int n, m;
  cin >> n >> m;
  int w[n], a[m];
  deque<int> d1, d2;
  map<int, int> m1;
  for (int i = 0; i < n; i++) {
    cin >> w[i];
  }
  for (int i = 0; i < m; i++) {
    cin >> a[i];
    if (m1[a[i]] == 0) {
      d1.push_back(a[i]);
    }
    m1[a[i]]++;
  }
  int c, sum = 0;
  for (int i = 0; i < m; i++) {
    while (!d1.empty()) {
      c = d1.front();
      if (d1.front() == a[i]) {
        d1.pop_front();
        break;
      } else {
        sum += c;
        d2.push_back(c);
        d1.pop_front();
      }
    }
    while (!d2.empty()) {
      d1.push_front(d2.back());
      d2.pop_back();
    }
    d1.push_front(c);
  }
  cout << sum;
}
