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 > Remove One or a Perfect Square > Editorial

Remove One or a Perfect Square — Solution & Editorial

Back to the Problem

Grundy DP: g[n] = mex of reachable values; non-zero means the first player wins.

Complexity: O(max n · moves)