package code.two;

import java.util.List;

//The gray code is a binary numeral system where two successive values differ in only one bit.
//
//Given a non-negative integer n representing the total number of bits in the code, print the sequence of gray code. A gray code sequence must begin with 0.
//
//For example, given n = 2, return [0,1,3,2]. Its gray code sequence is:
//
//00 - 0
//01 - 1
//11 - 3
//10 - 2
//Note:
//For a given n, a gray code sequence is not uniquely defined.
//
//For example, [0,2,3,1] is also a valid gray code sequence according to the above definition.
//
//For now, the judge is able to judge based on one instance of gray code sequence. Sorry about that.
public class GrayCode_undo_cantundestand {
	public List<Integer> grayCode(final int n) {
		return null;
	}
}
