P1:    'Hello, world!'
P2:    'Hello, world!'
P3:    'Hello, world!'
06 October 2025 11:19:45 AM

P0:  HELLO_MPI - Master process:
P0:    C++/MPI version
P0:    An MPI example program.

P0:    The number of processes is 4

P0:    'Hello, world!'
P0:    Elapsed wall clock time = 3.855e-06 seconds.

P0:  HELLO_MPI:
P0:    Normal end of execution.

06 October 2025 11:19:45 AM