import java.util.Scanner;
class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		long total = 0;
		
		for(int i = 0 ; i < n ; i++) {
			total += sc.nextLong();
		}
		System.out.println(total);
	}
}