"简简单单"

点个赞吧求求了!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

#include<iostream>
using namespace std;
int main(){
    int n,x,sum=0;
    cin>>n;
    for(int i=1;i<=n;i++){
        char a;
        cin>>a;
        x=a;
        if(x>=97&x<=122){
            x-=96;
        }
        else{
            x=-x;
        }
        sum+=x;
    }
    cout<<sum;
    return 0;
}