#include <iostream> // include I/O library
#include <ctime>    // include the library "ctime"
                    // we can use "ctime" in C++ instead of using "time.h" in C

using namespace std; // specify to use the "std" namespace



// main test function
int main()
{

  // define "start" "finish" as "clock_t" type
  clock_t start;  
  clock_t finish;  

  // get the delay of executing the clock() function
  start = clock();
  finish = clock();
  double delay = (double)(finish - start);
  
  // start timing. Keep the start time in "start"
  start = clock();




  // *** BEGIN YOUR PROGRAM HERE ***
  for (int i=0; i<122000000; i++)
    {}

  // *** END YOUR PROGRAM ***




  // finish timing. Keep the end time in "finish"
  finish = clock();


  // compute the exact running time without the delay
  double elapsed_iter = (double)(finish - start);
  elapsed_iter -= delay;
  
  // covert to second format
  double elapsed_second = elapsed_iter / CLOCKS_PER_SEC;

  // output the time elapsed.
  cout<<"Time elapsed:"<<(double)elapsed_second<<" seconds."<<endl;

  return 0;

}