import java.util.Scanner;
import java.io.File;
import java.io.FileNotFoundException;

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

			Scanner sc = new Scanner(System.in);
			Scanner sc2 = new Scanner(System.in);
			int N = sc.nextInt();
			for(int i = 0;i<N;i++){				
				String str = sc2.nextLine();
				Long num = Long.parseLong(str);
				totalnum += num;
			}
			System.out.println(totalnum);
		
	}
}