import java.util.Scanner;
class Work3_6
{
	public static void main(String[] args)
	{
		Scanner input = new Scanner(System.in);

		int total = 0;
		int val1 = 0;	// hold data

		val1 = input.nextInt();	// priming read
		while(val1>0)			// check the sentinel
		{
			total += val1;
			val1 = input.nextInt();	// read next
		}

		System.out.println("total = " + total);

	}
}