#include <ctime>
#include <iostream>

using namespace std;

int main()
{
   
   int x;
   int m = 10000000;

   int start = clock();
   // code to be timed
   for (int i = 0; i < m; i++) x = i;
   int end = clock();
   cout << m << " took " << static_cast<double>(end-start)/CLOCKS_PER_SEC
	<< " seconds to run." << endl;
   
   m *= 10;
   start = clock();
   // code to be timed   
   for (int i = 0; i < m; i++) x = i;
   end = clock();
   cout << m << " took " << static_cast<double>(end-start)/CLOCKS_PER_SEC
	<< " seconds to run." << endl;
   
   m *= 10;
   start = clock();
   // code to be timed   
   for (int i = 0; i < m; i++) x = i;
   end = clock();
   cout << m << " took " << static_cast<double>(end-start)/CLOCKS_PER_SEC
	<< " seconds to run." << endl;

   return 0;
}