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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 > By Contest > QC Demo Round (internal test)

Problems from QC Demo Round (internal test)

Held Jul 22, 2026 — solve them untimed; nothing here changes the standings or ratings.

Your status#ProblemSolversAcceptanceDifficulty
A Sum of Two Numbers 42 66% 800
B Even or Odd 26 34% 800
C Sum of an Array 20 59% 800
D ROT13 14 75% 800