Can you please provide solution to this problem in java. I have tried my best to remove TLE. It does not work.
Also, how can this problem be solved without using Set or HashMap
No same permutation
@vkth
To avoid TLE, you have to avoid generating all the permutations. You will get TLE if you generate all the permuations.
I am attaching a code snippet of the function to generate unique permutation.
Thank you. It worked out. 
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