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 > Local or Global > Editorial

Local or Global — Solution & Editorial

Back to the Problem

Counts coincide iff no inversion spans distance ≥ 2 — i.e. max(a1..i) never exceeds ai+2. One sweep with a running max.

Complexity: O(N)

Watch out: Counting both quantities separately is O(N log N) and unnecessary — the structural criterion is one pass.