import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        long number = 0;
        for (int i=0; i<a;++i) {
        	long b = sc.nextLong();
        	 number += b;
        }
        System.out.println(number);
    }
}