#include <iostream>
#include <vector>
#include <numeric>
using namespace std;
typedef long long LL;
int main() {
	LL n;
	cin >> n;
	vector<LL> a(n);
	for (LL i = 0; i < n; i++)cin >> a[i];
	cout << accumulate(a.begin(), a.end(), 0LL) << endl;
}