import java.util.Scanner;
public class No9009{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int number = sc.nextInt();
        long arry[] = new long[number];
        long sum = 0;
        for (int i=0; i < number; i++){
            arry[i] = sc.nextLong();
            sum += arry[i];
        }
        System.out.println(sum);
    }
}