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 > Take-Away Game > Editorial

Take-Away Game — Solution & Editorial

Back to the Problem

Positions where N is a multiple of K+1 are losing: any move leaves a non-multiple, and the opponent can always restore one. So FIRST wins iff N mod (K+1) ≠ 0.

Complexity: O(1)