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  1. #include<iostream>
  2. using namespace std;
  3.  
  4. int w[510],fl[510],st[510],od[510];
  5. int main()
  6. {
  7.   int i,j,k=0,n,t,tt,m,sm=0;
  8.   cin>>n>>m;
  9.   for(i=1;i<=n;i++)
  10.   cin>>w[i];
  11.   for(i=0;i<m;i++)
  12.   {
  13.       cin>>od[i];
  14.  
  15.       if(fl[od[i]]==0)
  16.       st[k++]=od[i];
  17.       fl[od[i]]=1;
  18.   }
  19.   /*if(n==500)
  20.   {
  21.       for(i=0;i<10;i++)
  22.   cout<<od[i]<<" ";
  23.   cout<<"\n";
  24.   }*/
  25.   for(i=0;i<m;i++)
  26.   {
  27.       j=0;
  28.  
  29.       while(j<k&&od[i]!=st[j])
  30.       {
  31.          sm+=w[st[j]];
  32.           j++;
  33.       }
  34.       for(t=j;t>0;t--)
  35.       st[t]=st[t-1];
  36.       st[0]=od[i];
  37.  
  38.   }
  39.  
  40.   cout<<sm;
  41.         return 0;
  42. }
  43.  
Success #stdin #stdout 0s 2696KB
comments (?)
stdin 
3 3
10 20 30
1 2 3
stdout 
40
https://ideone.com/l9otVc
language:
C++ 4.3.2 (gcc-4.3.2)
created:
11 years ago
visibility:
public

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