/*
 * 9008.cpp
 */

//include files
#include<bits/stdc++.h>

using namespace std;

//DEFINE CONSTANT

//DEFINE PROTOTYPE

int main(){
  long long a,sum;
  int N;
  cin >> N;
  for(int i=0 ; i<N ; i++){
	cin >> a;
	sum += a;
  }
  cout << sum << endl;
  
}