import java.util.Scanner;

public class enter{
	public static void main(String[] args){
		Long totalnum = 0L; 

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