Halloween Sale
Unlock all premium questions for over 30% off
Count Fancy Numbers
Medium
Question
Call a number fancy when its base-4 representation uses only the digits 0 and 1. For instance, 20 is fancy since it is written 110 in base 4, but 22 is not, since it is written 112.
...
Asked at:Hudson River Trading
More Hudson River Trading interview questions
- Reversi Single Move Simulationmedium
- Implement itoa Functioneasy
- Guess Hidden Number IImedium
- Winner of a Dot Grid Gamemedium
- Traverse and Merge Two Keyed N-ary Treeshard
OfferRetriever
Master technical interviews with real questions from top companies. Build your confidence and career.
LEGAL
© 2026 Purple Business Holdings LLC. All rights reserved. See Terms of Service.