#include <iostream>     
#include <chrono>       
#include <thread>                        
 
int main ()
{
    using std::chrono::system_clock;
   using std::chrono::milliseconds;
   using std::chrono::seconds;
   using std::chrono::duration_cast;
   const auto duration = milliseconds(1000);
   const auto start = system_clock::now()-milliseconds(55000);
 
   for(int i=0; i<10; i++)
   {
       std::this_thread::sleep_for(duration);
   const auto stop = system_clock::now();
 
   const auto difference = std::chrono::duration_cast<seconds>(stop - start).count();
 
   std::cout << "Difference is =>" << difference << std::endl;
 
   }
}

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