Braze Senior Software Engineer Front End interview questions

A recruiter reached out to me about Braze. After a quick call, they scheduled a tech screen. The tech screen consisted of 3 algorithm questions, each building on top of the one before and the interviewer jumped right into it after a brief intro. The questions weren't really difficult but I didn't understand the last one and so, I wasn't able to complete it on time. I was given a couple of minutes at the very end for questions about the company. Heard back from the recruiter a day later that they have passed on me.