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 > Two Kinds of Stamps > Editorial

Two Kinds of Stamps — Solution & Editorial

Back to the Problem

T must be a multiple of g = gcd(A, B); then check small residues: iterate k = number of A-stamps modulo B/g — equivalently test T − kA divisible by B for k in [0, min(T/A, B/g−1)]. That bound keeps the loop tiny.

Complexity: O(1) or O(log)