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 > Emptying Two Piles > Editorial

Emptying Two Piles — Solution & Editorial

Back to the Problem

Each move removes 3 coins total, so 3 | (A+B); and neither pile may exceed twice the other (the bigger pile loses at most 2 per move). Both conditions together are sufficient.

Complexity: O(T)