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 > Subtraction Game Oracle > Editorial

Subtraction Game Oracle — Solution & Editorial

Back to the Problem

Compute Grundy numbers g[n] = mex{ g[n−s] : s in S, s ≤ n } up to the maximum query; g[n] ≠ 0 means the first player wins. (Grundy sequences become periodic, enabling huge n.)

Complexity: O(max n · |S|)