import java. util. *;

public class Main{
	public static void main (String[] args){
		Scanner scanner = new Scanner (System. in);
		
		int count = scanner. nextInt();
		long number;
		long all = 0;
		for (int j = 0; j < count; j ++){
			number = scanner. nextLong();
			all += number;
		}
		System. out. println (all);
	}
}