#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
//#define int long long 
#define rep(i, a, b) for (int i = a; i < b; i++)
#define rrep(i, a, b) for (int i = a; i >= b; i--)
#define ALL(x) std::begin(x), std::end(x)
int main()
{
	cin.tie(0);
	ios::sync_with_stdio(false);
	constexpr char endl = '\n';

	int N; cin >> N;
	ll A[N];
	rep(i,0,N) cin >> A[i];
	ll tot = 0;
	rep(i,0,N) tot += A[i];
	cout << tot << endl;
	
}