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 > Dynamic Range XOR > Editorial

Dynamic Range XOR — Solution & Editorial

Back to the Problem

A segment tree (or Fenwick tree where the aggregate is invertible) supports both operations in O(log N). Point-assign updates the leaf and re-aggregates up the path.

Complexity: O((N + Q) log N)