#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (n); i++)
using namespace std;
using ll = long long;
using pii = pair<int, int>;

int main() {
  int n;
  cin >> n;
  ll s = 0;
  rep(i, n) {
    ll a;
    cin >> a;
    s += a;
  }
  cout << s << endl;
  return 0;
}