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

void task1(void)
{
  int i,j;
 
  for (i=0; i<3; i++) {
    for (j=0; j<1000; j++) ;
    printf("1");
    fflush(stdout);
  }
}

void task2(void)
{
  int i,j;

  for (i=0; i<5; i++) {
    for (j=0; j<10000; j++) ;
    printf("2");
    fflush(stdout);
  }
}

void task3(void)
{
  static uint64_t previous;
  uint64_t t;
  struct timeval tv;

  if (previous == 0) {
    gettimeofday(&tv, NULL);
    previous = tv.tv_sec * 1000ULL + tv.tv_usec / 1000ULL;
  }

  gettimeofday(&tv, NULL);
  t = tv.tv_sec * 1000ULL + tv.tv_usec / 1000ULL;
  printf("\tT: %Lu\n", t - previous);
  previous = t;
}