有的题目如果觉得数据有问题，就去这两个网站找到题目重新加交一下
https://loj.ac/p?page=63
http://ybt.ssoier.cn:8088/index.php

分治算法：
https://oi-wiki.org/basic/divide-and-conquer/
学习资料参考：
http://www.tup.tsinghua.edu.cn/upload/books/yz/090180-01.pdf
https://www.hello-algo.com/chapter_divide_and_conquer/divide_and_conquer/
https://blog.csdn.net/smallrain6/article/details/122897323
https://blog.csdn.net/qq_44398094/article/details/109920912


二分/三分：
https://oi-wiki.org/basic/binary/
https://blog.csdn.net/Mr_dimple/article/details/114656142/