import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int count = sc.nextInt();
		long result = 0;
		for(int i=0;i<count;i++){
			long input = sc.nextLong();
			result += input;
		}
		System.out.println(result);
	}//mainmethod

} //class