#include <sys/timeb.h>
#include <time.h>
#include <unistd.h>
#include <iostream>


int main()
{

  timeb t1, t2;

  ftime( &t1 );

  sleep( 3 );

  ftime( &t2 );

  long dtsec       = long ( t2.time ) - long ( t1.time );
  short int dtmsec = t2.millitm - t1.millitm;

  cout << dtsec << ":" << dtmsec << endl;

  return 0;
}