Hello Everyone!
The link to the question
https://atcoder.jp/contests/abc172/tasks/abc172_f
The approach I am unable to understand.
https://codeforces.net/blog/entry/79438
I am finding it difficult to how is the author deciding what bits to set in x on basis of S. Mainly the 3rd and 4th paragraph of the solution, I am unable to grasp.
It would be really helpful if someone who was able to understand the approach can describe in his own words.
Thank you
If someone can answer it please answer. It would be quite helpful.