#include <iostream>
using namespace std;
                                                                                                
  
int main(){


    long long n, i, a;

    long long s = 0;


    cin >> n;

    for( i = 0 ; i < n ; i = i + 1 ){

         cin >> a;

         s += a;

         }
                                            

    cout << s << endl;

    return 0;

}