Hiring process8 levels
  1. 1 IQ Test
  2. 2 Additional Online Test (If Required)
  3. 3 Office Interview with Hiring Manager
  4. 4 Unpaid Test Task (Motivation Check)
  5. 5 Paid Test Task and Follow-Up Interview
  6. 6 Iterative Paid Test Tasks
  7. 7 Office Verification
  8. 8 Final Interview with the Founder

Problems > The Busiest Moment > Editorial

The Busiest Moment — Solution & Editorial

Back to the Problem

Sweep events: +1 at a, −1 at b+1 (inclusive end). Sort events and track the running count's maximum.

Complexity: O(N log N)

Watch out: Endpoints are inclusive: a guest leaving at time b still counts at b, so the −1 event belongs at b+1.