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 > Fewest Refuels > Editorial

Fewest Refuels — Solution & Editorial

Back to the Problem

Greedy with a max-heap: drive as far as fuel allows, banking every reachable station's fuel in a heap; when stranded, refuel from the largest banked station. Each refuel is one stop.

Complexity: O(N log N)

Watch out: You may reach a station and choose NOT to buy there — bank it in the heap and buy later only if needed.