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

int main() {
	int i;
	cin >> i;
	vector<uint64_t> num(i);
	
	for (uint64_t x = 0; x < i; x++) {
		cin >> num[x];
	}
	
	
	uint64_t k;
	k = accumulate(num.begin(), num.end(), 0);
	cout << k;
	
	return 0;
}