Unable to find an approch to solve this question

Sir, could you please give me an idea to solve this problem. also add how do you think of that approach.
thanks.

@raghurajj hey,first calculate total powers of all prime number in array. For example - in array [3 18 2 2] total powers of 2 will be 3 and powers of 3 will be 3. Now let me try to relate this problem with a classical game theory problem.

Let prime numbers are piles of stones and their total prime powers in array are equivalent to respective piles size. Now this has become a problem where two players are playing optimally and they reduce every pile to size 0. The last player unable to move loses.

I suggest you to read over internet about NIM game.

yeah got it sir…thanks!!

@raghurajj welcome bro.

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