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

import java.io.*;
import java.util.*;
public class c2014{
   public static void main(String[] args) {
      MyScanner obj = new MyScanner();
      int n=obj.nextInt();
      int m=obj.nextInt();
      int a[]=new int[n+1];
      int seq[]=new int[m+1];
      for(int i=1;i<=n;i++)
      {a[i]=obj.nextInt();}
	  for(int i=1;i<=m;i++)
	  {seq[i]=obj.nextInt();}
	  int f,pos,fil=1,sum=0;
	  int b[]=new int[n+1];
	  int seq1[]=new int[n+1];
	  Arrays.fill(b,0);
	  for(int j=1;j<=m;j++)
	  {
		  f=0;pos=1;
		  for(int i=1;i<=n;i++)
		  {
			 if(a[seq[j]]==b[i]&&seq[j]==seq1[i])
			 {   
				 f=1;
				 pos=i;
			 } 
			 if(b[i]==0)fil=i;
		 }
		 if(f!=1)
		 {
			 for(int i=fil;i>1;i--){
			 b[i]=b[i-1];
			 seq1[i]=seq1[i-1];
			 sum+=b[i];}
			 b[1]=a[seq[j]];
			 seq1[1]=seq[j];
			 
			 
		 }
		 if(f==1)
		 {
			 for(int i=pos;i>1;i--)
			 {
				 b[i]=b[i-1];
				 seq1[i]=seq1[i-1];
				 sum+=b[i];
			 }
			// sum-=a[seq[pos]];
			 b[1]=a[seq[j]];
			 seq1[1]=seq[j];	
		 }
	 }
	 System.out.println(sum);
}
   
   public static class MyScanner {
      BufferedReader br;
      StringTokenizer st;
 
      public MyScanner() {
         br = new BufferedReader(new InputStreamReader(System.in));
      }
 
      String next() {
          while (st == null || !st.hasMoreElements()) {
              try {
                  st = new StringTokenizer(br.readLine());
              } catch (IOException e) {
                  e.printStackTrace();
              }
          }
          return st.nextToken();
      }
 
      int nextInt() {
          return Integer.parseInt(next());
      }
 
      long nextLong() {
          return Long.parseLong(next());
      }
 
      double nextDouble() {
          return Double.parseDouble(next());
      }
 
      String nextLine(){
          String str = "";
	  try {
	     str = br.readLine();
	  } catch (IOException e) {
	     e.printStackTrace();
	  }
	  return str;
      }

   }
}
