The structure of my solution is inspired by standard combinatorial DP patterns, similar to those described in this Codeforces blog. This includes building solutions by accumulating valid transitions over constrained intervals, which is common in problems involving subsets, partitions, or sequence construction. This further supports that the logic I used is well-established and publicly available before the contest.

https://mirror.codeforces.com/blog/entry/62690

The solution I submitted for problem 2119D involves a dynamic programming approach that is natural and well-known for sequence-based combinatorial problems.

However, if needed, I’m happy to provide: • My local development history • My logic/thinking process for arriving at the recurrence • Intermediate attempts or test cases I used to debug

I respect the rules of Codeforces and did not intend to violate them in any way. Please consider this explanation for your re-evaluation. Thank you.