#include <iostream>

int main() {
	int N;
	std::cin >> N;
	
	long long answer = 0LL;
	for( int i = 0; i < N; i++ ) {
		long long Ai;
		std::cin >> Ai;
		answer += Ai;
	}
	std::cout << answer << std::endl;
	
	return 0;
}