Getting TLE in one Case

Sir , Getting TLE in one Case
Code is here

@vg5823967 This code only works for smaller n, and constraints on n are large for n_queen_hard problem.
Think of it using bitmask.
You can refer this -:

I hope I’ve cleared your doubt. I ask you to please rate your experience here
Your feedback is very important. It helps us improve our platform and hence provide you
the learning experience you deserve.

On the off chance, you still have some questions or not find the answers satisfactory, you may reopen
the doubt.