#include <iostream>
#include <mpi.h>

using namespace std;

int main(int argc, char* argv[]){
MPI::Status status;
//MPI::Request request;
int rank, size, rankF = 1;
int data[10], received[10];

MPI::Init(argc, argv);
rank = MPI::COMM_WORLD.Get_rank();
size = MPI::COMM_WORLD.Get_size();

if(size >= 3){
	if(rank == 0){
		MPI::COMM_WORLD.Isend(&data, 10, MPI::INT, 1, rankF);
		//request.Wait(status);
		cout<<status.Get_source()<<"\n";
	}
		//for(rankF = 1; rankF < size; rankF++){
			if(rankF == size-1){
				MPI::COMM_WORLD.Irecv(&received, 10, MPI::INT, rankF, MPI::ANY_TAG);
				MPI::COMM_WORLD.Isend(&received, 10, MPI::INT, 0, rankF);
				//request.Wait(status);
				cout<<status.Get_source()<<rankF<<"\n";
			}
			else{
				 MPI::COMM_WORLD.Irecv(&received, 10, MPI::INT, rankF, MPI::ANY_TAG);
				MPI::COMM_WORLD.Isend(&received, 10, MPI::INT, rankF+1, rankF);
				//request.Wait(status);
				cout<<status.Get_source()<<rankF<<"\n";
			}
		//}
}
MPI::Finalize();
return 0 ;
}