#include <stdio.h>
main ( ) {
  int sum, size_one, size_two, size_three;
  printf ("Please type three trade sizes.\n");
  scanf ("%i%i%i", &size_one, &size_two, &size_three);
  sum = size_one + size_two + size_three;
  printf ("The sum of the trade sizes is %i.\n", sum);
}