## 2023-02-27

https://zhuanlan.zhihu.com/p/82169428

## 2023-02-26

the representation of the value “1” in binary would normally be “001” and “2” would be “010”. In Gray code, these values are represented as “001” and “011”. That way, incrementing a value from 1 to 2 requires only one bit to change, instead of two.

https://en.wikipedia.org/wiki/Gray_code