If you like to play games like cs go, then I can definitely recommend cs go gambling games, where you can play using cs go skins. In addition, there are now reliable CSGO roulette sites with really good conditions for players. I think it makes sense to read more about the most popular platforms and choose something that is most secure.

Note: time complexity is O(1), not O(log n) as stated in the editorial.
(Given that python's "bit_length()" is O(1).)

Here is problem solution in Python Java C++ and C programming - https://programs.programmingoneonone.com/2021/07/hackerrank-a-stones-game-problem-solution.html

I have not understood the problem

Beautiful problem, really enjoyed after solving this problem :) Do some observations and think greedily.