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 > Best Pairing > Editorial

Best Pairing — Solution & Editorial

Back to the Problem

Sort and pair adjacent values: big×big and (−big)×(−big) — an exchange argument shows any crossing pairing is never better.

Complexity: O(N log N)