import java.util.Scanner;

public class space{
	public static void main(String[] args){
		long totalnum=0;

		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		Scanner sc2 = new Scanner(System.in);
		for(int i = 0;i < N;i++){
			long addnum = sc.nextLong();
			 totalnum += addnum; 
		}
		System.out.print(totalnum);
	}
}