#include <iostream>
#include <numeric>
#include <vector>
#include <cstdint>
using namespace std;

int main() {
	int i;
	cin >> i;
	vector<unsigned long long> num(i);

	for (int x = 0; x < i; x++) {
		cin >> num[x];
	}


	unsigned long long k=0;

	for (int x = 0; x < i; x++) {
		k += num[x];
	}
	cout << k;

	return 0;
}