import java.util.Scanner;

class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Scanner scanner = new Scanner(System.in);
		long a, sum = 0;
		while (scanner.hasNext()){
			a = scanner.nextLong();
			sum += a;
		}
		System.out.println (sum);
	}
}