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- #include<bits/stdc++.h>
- using namespace std;
- int main()
- {
- string str,s;
- int x,i,arr[4],sum=0;
- for(i=0;i<4;i++){
- cin>>arr[i];
- }
- cin.ignore(numeric_limits<streamsize>::max(),'\n');
- cin>>str;
- int arr2[str.size()];
- for(i=0;i<str.size();i++){
- s=str[i];
- arr2[i]=stoi(s);
- }
- for(i=0;i<str.size();i++){
- x=(arr2[i]-1);
- sum+=arr[x];
- }
- cout<<sum<<endl;
- }
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