// -*- mode: d -*-
// $Id: $
// http://www.bagley.org/~doug/shootout/

import string;
import stream;

int main()
{
   int sum = 0;
   char[] line;

   while ((line = stdin.readLine()).length)
      sum += string.atoi(line);

   printf("%d\n", sum);
   return(0);
}