#include <iostream>
#include<bits/stdc++.h>
using namespace std;
int main() {
// your code goes here
int n;
cin>>n;
vector<int> arr(n);
int sum=0;
for(int i=0;i<n;i++){
cin>>arr[i];
sum=sum+arr[i];
}
int ans=0;
for(int i=0;i<n;i++){
int size = to_string(arr[i]).size();
int p=1;
for(int i=0;i<size;i++){
p=p*10;
}
int val = sum*p + n*arr[i];
ans = ans+val;
}
cout<<ans<<endl;
return 0;
}
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