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 > Routes Across a Grid > Editorial

Routes Across a Grid — Solution & Editorial

Back to the Problem

A route is a shuffle of H−1 downs and W−1 rights: C(H+W−2, H−1). Compute with factorials or an incremental product plus modular inverse.

Complexity: O(H + W)