#include <iostream>

using namespace std;

int main()
{
	int n = 0;
	int64_t a = 0;
	int64_t sum = 0;
	
	cin >> n;

	for (int i = 0; i < n; ++i) {
		cin >> a;
		sum += a;
	}

	cout << sum << endl;

	return 0;
}