#include <iostream>
#include <mpi.h>
 
int main(int argc, char** argv) {
    int world_rank;
    int world_size;
    int data = 0;
 
    MPI_Init(&argc, &argv);
    MPI_Comm_rank(MPI_COMM_WORLD, &world_rank);
    MPI_Comm_size(MPI_COMM_WORLD, &world_size);
 
    if (world_rank == 0) {
        data = 42;
        MPI_Send(&data, 1, MPI_INT, 1, 0, MPI_COMM_WORLD);
    }
    else if (world_rank == 1) {
        MPI_Recv(&data, 1, MPI_INT, 0, 0, MPI_COMM_WORLD, MPI_STATUS_IGNORE);
    }
 
    if (world_rank == 1) {
        std::cout << "Process " << world_rank << " received: " << data << std::endl;
    }
 
    MPI_Finalize();
    return 0;
}

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