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#include
#include
#include
int main(int argc, char *argv[])
{
    int npes, myrank;
    double a=10.0;
    MPI_Init(&argc, &argv);
    MPI_Comm_size(MPI_COMM_WORLD, &npes);
    MPI_Comm_rank(MPI_COMM_WORLD, &myrank);
    a = sqrt(a);
    printf("From process %d out of %d, Hello World!\n", myrank, npes);
    MPI_Finalize();
}
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