#include <bits/stdc++.h>
using namespace std;
#define REP(i,N) for(i=0;i<N;i++)
typedef long long ll;
typedef pair<int, int> P;
typedef struct{
  int first;
  int second;
  int third;
}T;

//昇順
bool comp_Se(T& l, T& r){
  return l.second < r.second;
}

int main(void){
  ll i,N,sum=0;
  cin >> N;
  vector<ll> A(N);
  REP(i,N) cin >> A[i];
  REP(i,N) sum+=A[i];
  cout << sum << endl;
  return 0;
}