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 Teams > Editorial

Two Teams — Solution & Editorial

Back to the Problem

2-color with BFS: neighbours get the opposite color; a same-color edge proves an odd cycle. Run from every component.

Complexity: O(N + M)

Watch out: Self-loops make it instantly non-bipartite, and disconnected graphs need every component colored.