#include <iostream>
#include <string>
#include <sstream>
int main()
{
	int n;
	std::cin >> n;
	std::cin.ignore();

	unsigned long long sum = 0;

	std::string input;
	std::getline(std::cin, input);

	std::stringstream ss{ input };
	std::string buf;
	while (std::getline(ss, buf, ' '))
	{
		sum += std::stoull(buf);
	}

	std::cout << sum << std::endl;
	
	return 0;

}