CodingEasycod-g840

Subject Bit manipulationLevel Mid–Senior~10 minCommon in Algorithms & data structures interviewsIndustries Software development, Telecom

Question

Return the n-th value (0-indexed) of the standard reflected binary Gray code sequence, for non-negative n. Consecutive Gray code values differ in exactly one bit, which makes them useful for error-resistant encoders and in some communication/position-sensing systems. The closed form is simply n XOR (n >> 1). Return that value.

Implement

gray_code(n: int) → int

Examples

in[3]out2

What a strong answer looks like

State your approach and its time/space complexity out loud before you optimize. Handle the edge cases (empty input, duplicates, overflow), and say why you chose this over the brute force. Green tests are the floor, not the grade.

Learn the concepts

Vibe coding: describe the solution in plain language (or narrate it) and the coach grades your approach. Generating runnable code from your description is coming next.

Run or narrate your approach, then ask the coach.