FWT学习笔记

https://www.cnblogs.com/RRRR-wys/p/9478045.html

2017 北京区域赛 J题

https://blog.csdn.net/bllsll/article/details/78572397

fwt优化dp 

https://www.cnblogs.com/HITLJR/p/7668136.html

多校赛双指针 https://blog.csdn.net/acm_zl/article/details/10224149、

带修莫队

https://blog.csdn.net/linzhiqqq/article/details/77816797#comments

https://blog.csdn.net/snowy_smile/article/details/50759660?locationNum=8

多校赛 代码  https://ideone.com/Wo55gi