import java.util.Scanner;
import java.io.*;

public class fileread
{
  
   public static void main (String[] args) throws IOException
   {
      String line;
      Scanner fileScan, lineScan;
      int sum = 0;
      int x = 0;

// Could easily take the filename as input or from command line

      fileScan = new Scanner (new File("foo.txt"));

      // Read and process each line of the file

      while (fileScan.hasNext())
      {
         line = fileScan.nextLine();

         lineScan = new Scanner (line); // want to scan this line

         while (lineScan.hasNext()) {

// Throws an exception if the next token is not an int!!
// Should really catch that exception ;)

            x = lineScan.nextInt();
            sum = sum + x;
         }

         System.out.println(sum);
      }
   }
}