#include<bits/stdc++.h>
using namespace std;

int main() {
  int N;
  unsigned long long sum = 0;
  cin >> N;
  vector<long long> A;
  for (int i = 0;i < N; i++) {
    cin >> A[i];
    sum += A[i];
  }
  cout << sum << endl;
  return 0;
}