splay&treap

# splay&treap ## 前置芝士 [$Splay$ 1](https://blog.csdn.net/ModestCoder_/article/details/90139481) [$Splay$ 2](https://www.luogu.com.cn/blog/LiBoyi/post-xue-xi-bi-ji-splay) [$Treap$ 1](https://blog.csdn.net/u014634338/article/details/49612159) [$Treap$ 2](https://www.cnblogs.com/guoshaoyang/p/11300886.html) [$FHQ-Treap$ 1](https://www.luogu.com.cn/blog/LiBoyi/post-xue-xi-bi-ji-fhq-treap) [$FHQ-Treap$ 2](https://www.cnblogs.com/mjtcn/p/8028926.html#_labelTop)