import java.util.Arrays;
import java.util.Scanner;
public class sum{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		long sum = 0;
		int i;
		for(i=0; i<n; i++){
		    long input = sc.nextLong();
			sum += input; 
		}		
		System.out.println(sum);
		sc.close();
	}
}