https://www.cnblogs.com/huashanqingzhu/p/7278930.html
http://bailian.openjudge.cn/practice/1222
1222:EXTENDED LIGHTS OUT
It took me a lot of time to figure out this question. The more d
Tag: program design
What general guidelines and best practices are needed when designing a database for an application?
My question is about database modeling. I tried to look for this question in other database design questions on SO, but haven’t found it yet, so I’m asking here:
What are the general guidelin
What is it in the 2019 South China University of Technology? Is there any empty? Can you come to alchem? (Thinking of thinking)
https://ac.nowcoder.com/acm/contest/625/B
Analysis:
All status is only 1<< 18, so we can preprocess f[u][j], and then build a state diagram of all the states that u can transfer;