import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		long sum = 0;
		for(int i=1;i<=N;i++){
		    long A = sc.nextInt();
		    sum += A;
		}
	System.out.println(sum);
	}
}