import java.util.Scanner;
import java.util.ArrayList;

public class Test{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		ArrayList<Long> list = new ArrayList<Long>();
		int n = sc.nextInt();
		while(sc.hasNext()){
			list.add(sc.nextLong());
		}
		
		long sum = 0;
		for(int i=0; i<=n; i++){
			sum += list.get(i);
		}
		System.out.println(sum);
	}
}