The coding question is about the Monotone Stack. After the initial attempt, you need to improve the time complexity.
In fact, you'll be required to complete two questions in a 45-minute interview, which feels like a tight time constraint for me.
Why Citadel?
Any relevant experience?
The following metrics were computed from 4 interview experiences for the Citadel Software Developer Intern role in United States.
Citadel's interview process for their Software Developer Intern roles in the United States is extremely selective, failing the vast majority of engineers.
Candidates reported having very good feelings for Citadel's Software Developer Intern interview process in United States.