#include<boost/thread.hpp>
#include<boost/chrono.hpp>
#include<iostream>


using namespace std;
using namespace boost;

void mw(int tid) {
	cout<<"Hello from the thread["<<tid<<"]"<<endl;
	while(true) {
	  this_thread::sleep_for(boost::chrono::milliseconds(500));
	  cout<<"["<<tid<<"]"<<endl;
		             }
	                 }

int main() {
     int count=1;
     thread_group *tg=new thread_group();
     int n;
     cout<<"Give n:";
     cin>>n;
      for(int i=0;i<n;i++,count++)
        {
	tg->add_thread(new thread(mw,count));
        }
	tg->join_all();
	return 0;
           }