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


int main () {
  struct timeval startTime;
  gettimeofday(&startTime, NULL);
  struct timeval endTime;
  gettimeofday(&endTime, NULL);
  printf("Start time: %li\n", startTime.tv_sec * (int)1e6 + startTime.tv_usec);
  printf("End time: %li\n", endTime.tv_sec * (int)1e6 + endTime.tv_usec);
  printf("Diff: %li\n", endTime.tv_sec * (int)1e6 + endTime.tv_usec - (startTime.tv_sec * (int)1e6 + startTime.tv_usec));
}