Algorithm 1. GWO Algorithm.

1: Initialize the grey wolf population Xi (i = 1, 2, 3,…,n) and t = 1.

2: Initialize C, a, and A using Equations (7) and (8).

3: Calculate the fitness of each search agent.

4: Put the best search agent as Xα,

the second best search agent as Xβ and

the third best search agent as Xδ.

5: while (t < Max number of iterations)

6:  for each search agent

7:   Modify the current search position using Equation (11).

8:  end for

9:  Update a, A, and C.

10: Calculate the fitness of all search agents.

11: Modify Xα, Xβ and Xδ.

12: t = t + 1.

13: end while

14: return Xα.