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 > The Bishop's Colors > Editorial

The Bishop's Colors — Solution & Editorial

Back to the Problem

Bishops never leave their square color ((r+c) mod 2). Same cell: 0; same diagonal: 1; same color otherwise: 2 (via one intermediate); different color: impossible.

Complexity: O(1)

Watch out: The color argument (parity of r+c) decides reachability before any distance logic.