#include <stdio.h>
#include <mpi.h>

int main(int argc, char** argv) {
    /* initialize MPI */
    MPI_Init(&argc, &argv);

    /* get the rank (process id) and size (number of processes) */
    int rank;
    MPI_Comm_rank(MPI_COMM_WORLD, &rank);

    /* try to read an integer */
    int number = 42;
    scanf("%d", &number);

    /* print a hello message */
    printf("Process %d read %d from stdin.\n", rank, number);

    /* quit MPI */
    MPI_Finalize();
    return 0;
}