Exercise 4

• Copy the source files pi source files to your kong account.
• Use the function omp_get_wtime() compare the performance of each version of the pi code and find out the most efficient algorithm.
  
• Vary the number of threads and re-run your codes and analyze the runtime of your code, for example, does your code run twice faster when you increase the number of threads by two times.
  
• Write a code to perform the dot product in an OpenMP parallel region for loop with a sum reduction.

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