[leetcode]Gray Code @ Python

原题地址:https://oj.leetcode.com/problems/gray-code/

题意:

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.

解题思路:格雷码的生成,采用数学的方法。

代码:

class Solution:
    # @return a list of integers
    def grayCode(self, n):
        res=[]
        size=1<<n
        for i in range(size):
            res.append((i>>1)^i)
        return res

 

[leetcode]Gray Code @ Python,古老的榕树,5-wow.com

郑重声明:本站内容如果来自互联网及其他传播媒体,其版权均属原媒体及文章作者所有。转载目的在于传递更多信息及用于网络分享,并不代表本站赞同其观点和对其真实性负责,也不构成任何其他建议。