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

/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
public class Main
{
    public static void main (String[] args) throws java.lang.Exception
    {
        // your code goes here
        BufferedReader inp=new BufferedReader(new InputStreamReader(System.in));
        String s0[]=inp.readLine().split(" ");
        int n=Integer.parseInt(s0[0]);
        int m=Integer.parseInt(s0[1]);
        String s1[]=inp.readLine().split(" ");
        String s2[]=inp.readLine().split(" ");
        int[] array=new int[n+1];
        int ammay[]=new int[m+1];
        boolean[] bool = new boolean[n+1];
        int[] ini=new int[n+1];
        int count=1;
        Stack st=new Stack();
        Stack rt=new Stack();
        int ans=0;
        for(int i=1;i<n+1;i++)
            {
                array[i]=Integer.parseInt(s1[i-1]);

            }

        for(int j=1;j<m+1;j++)
            {
                ammay[j]=Integer.parseInt(s2[j-1]);

            }
        
        for(int i=1;i<m+1;i++)
            {
                //System.out.println(ammay[i]);
                if(bool[ammay[i]]==false)
                {
                    ini[count]=ammay[i];
                    bool[ammay[i]]=true;
                    count++;
                }
            }
      // System.out.println("count"+count);
        for(int i=count-1;i>0;i--)
            {
            st.push(new Integer(ini[i]));
            }
        for(int i=1;i<m+1;i++)
           {
            while(true)
              {
               int num=(int)st.pop();
               if(num!=ammay[i])
                 {
                    rt.push(num);
                    ans=ans+num;
                 }
                 else if(num==ammay[i])
                 {
                    while(rt.empty()!=true)
                       st.push(rt.pop());
                        st.push(num);
                         break;
                 }
                
              }
           }
         System.out.println(ans);
    }
}