Amazon Graduate Software Developer interview questions

I found it challenging to answer the question in the allotted thirty minutes during the live session. Despite this, I passed both rounds of the behavior and home coding test. I really had to figure it out.

Applied and 3 days later i go OA 2 parts. 1st part is LC style questions (not the same, in my opinion poorly written description). Few days later mail they rejected me. Unfortunately no information explaining why - wether the CV was under/overqualified or did poorly on OA.