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

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