OAK (Optimized Algorithm Kit) is an OI oriented high-speed code module by the author TheToror, including basic modules such as fast I/O based on fread/fwrite, data structures such as graph, heap, matrix, Trie tree, Treap, Red–black tree, Network Flow, FFT based on instruction set, etc.
Place OAK in the project folder and directly embed it into the project through #include "tAlgo.hpp"