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 > How Many Longest Increasing > Editorial

How Many Longest Increasing — Solution & Editorial

Back to the Problem

Track, per position, both the LIS length ending there and how many achieve it. On a tie in length, add the counts; on a strict improvement, replace. Sum counts over all positions attaining the global maximum. (Fenwick trees give O(N log N).)

Complexity: O(N2) here