import java.util.Scanner;

public class Nsum {

	public static void main(String[] args) {

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

	}
}