Hiring process8 levels
  1. 1 IQ Test
  2. 2 Additional Online Test (If Required)
  3. 3 Office Interview with Hiring Manager
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  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 > A Fixed Remainder > Editorial

A Fixed Remainder — Solution & Editorial

Back to the Problem

The qualifying x are B, B+A, B+2A, ... — count them within [1, N], remembering that x = 0 does not count when B = 0.

Complexity: O(1)

Watch out: B = 0 excludes x = 0 (not in [1, N]) and B ≥ A yields zero — two separate traps.