import java.util.*;
public class No9009 {
	public static void main(String[] args) {
		int N;long a,Goukei=0;
		try(Scanner input =new Scanner(System.in)){
			N=input.nextInt();
			for(int i=1;i<=N;i++){
				Goukei+=input.nextLong();
			}
			System.out.println(Goukei);
		}catch(Exception e){
			e.printStackTrace();
		}
	}
}