import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        long a = sc.nextLong();
        long sum = 0L;

        for (long i = 0L; i < a; i++) {
            sum += sc.nextLong();
        }

        System.out.println(sum);
    }
}