HELLO
  C++/OpenMP version

  Number of processors available = 16
  Number of threads =              1
  This is process 0

HELLO
  Normal end of execution.

  Elapsed wall clock time = 1.81198e-05

HELLO
  C++/OpenMP version

  Number of processors available = 16
  Number of threads =              2
  This is process 0
  This is process 1

HELLO
  Normal end of execution.

  Elapsed wall clock time = 0.000119925

HELLO
  C++/OpenMP version

  Number of processors available = 16
  Number of threads =              4
  This is process   This is process 0
3
  This is process 2
  This is process 1

HELLO
  Normal end of execution.

  Elapsed wall clock time = 0.000273943