import java.util.Scanner;

public class Nsum {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		long a = sc.nextInt();
		long x = 0;
		for (long i = 1 ; i <= a ; i++){
			x += sc.nextInt();
		}
		System.out.println(x);

	}
}