import java.io.*;

class InputNum {
public static void main(String args[]) 
	throws IOException
	{ 
	// Loome andmete sisendvoo DataInputStream'i jaoks
	DataInputStream inData = new DataInputStream(System.in);
	String str;
	double  sum = 0.0, j = 0.0;
	
	Double i ;
	System.out.println(
	  "Sisestage arv (0 - väljumiseks)");
	do {
		  str = inData.readLine();
		  try {
		     i= Double.valueOf(str);
		  } catch (NumberFormatException e) {
			System.out.println("Ebakorrektne formaat.");
			i = new Double(0.0);
		  }
		j = i.doubleValue();
		sum += j;
		System.out.println("Summa on " + sum);
	   } while (j !=0.0);	
	}
}