#include <stdio.h>
#include <time.h>
#include <sys/time.h>


int main()
{
   struct timeval now;
   struct timeval sender;
   long long int t1, t2;
   long diffs[100*1024];
   const int num_diffs = sizeof(diffs)/sizeof(diffs[0]);
   fprintf(stderr, "Number of samples to collect: %d\n", num_diffs);

   int i = 0;
   while (fread (&sender, sizeof(sender), 1, stdin) != 0)
   {
       gettimeofday (&now, NULL);
       t1 = sender.tv_sec * 1000000;
       t1 += sender.tv_usec;

       t2 = now.tv_sec * 1000000;
       t2 += now.tv_usec;
       
       diffs[i] = (long)t2 - t1;
       
       i++;
       if (i > num_diffs)
       {
           i = 0;

           for (int j = 0; j<num_diffs; j++)
               printf("%ld\n", diffs[j]);

	   return 0;
       }
   }
}