#include<stdio.h>
#include<cs50.h>
int main()
{
  long num = get_long("Enter CC: ");
  long num2 = num;
  int sum = 0;
  int sum2 = 0;
  int digit;
  int digit2;

  while (num > 0)
  {
    digit = ((num / 10) % 10) *2;
      if (digit>9)
      {
          digit += - 9;
      }
   sum += digit;
   num = num / 100;
  }
  printf("sum = %d\n", sum);

  while (num2 > 0)
  {
    digit2 = (num2 % 10);
    sum2 += digit2;
    num2 = num2 / 100;
  }
  printf("sum 2 = %d\n", sum2);
  return 0;
}