import java.util.*;
public class no275{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        String n = sc.nextLine();
        long N = Long.parseLong(n);
        String input = sc.nextLine();
        String[] a = input.split("[ ]");
        long sum = 0;
        for(int i = 0; i < a.length; i++){
            sum += Long.parseLong(a[i]);
        }
        System.out.println(sum);
    }
}