import java.util.Scanner;

class no9009{
	public static void main(String[] args) {
		Scanner stdIn=new Scanner(System.in);
		int n=stdIn.nextInt();
		long a;
		long sum=0;
		for(int i=0;i<n;i++) {
			a=stdIn.nextLong();
			sum+=a;
		}
		System.out.println(sum);
	}
}