一些好用的网站

[$\text{图床}$](https://sm.ms/) [$\text{几何}$](https://csacademy.com/app/geometry_widget/) [$\text{图论}$](https://csacademy.com/app/graph_editor/) [$\text{函数}$](https://www.desmos.com/calculator) [$\text{找规律}$](http://oeis.org/) [$\text{矩阵运算}$](http://www.yunsuanzi.com/matrixcomputations/index.html) [$\text{在线汇编编译器}$](https://gcc.godbolt.org/) [$\mathrm{C++}$](http://www.cplusplus.com/) [$\LaTeX\text{公式大全}$](https://www.luogu.org/blog/IowaBattleship/latex-gong-shi-tai-quan) [$\LaTeX\text{公式奆全}$](https://blog.csdn.net/garfielder007/article/details/51646604) [$\text{.tex}$教程](https://www.cnblogs.com/jingwhale/p/4250296.html) [$\text{OI Wiki}$](https://oi-wiki.org/) [$\color{red}\mathrm{Wolfram}\color{orange}\mathrm{Alpha}$](http://www.wolframalpha.com/) [$\color{white}\colorbox{black}{oier数据库}$](http://bytew.net/OIer/)  ```  ```  ```  ```  ```  ``` ```cpp #pragma GCC diagnostic error "-std=c++11" #pragma GCC optimize("-fdelete-null-pointer-checks,inline-functions-called-once,-funsafe-loop-optimizations,-fexpensive-optimizations,-foptimize-sibling-calls,-ftree-switch-conversion,-finline-small-functions,inline-small-functions,-frerun-cse-after-loop,-fhoist-adjacent-loads,-findirect-inlining,-freorder-functions,no-stack-protector,-fpartial-inlining,-fsched-interblock,-fcse-follow-jumps,-fcse-skip-blocks,-falign-functions,-fstrict-overflow,-fstrict-aliasing,-fschedule-insns2,-ftree-tail-merge,inline-functions,-fschedule-insns,-freorder-blocks,-fwhole-program,-funroll-loops,-fthread-jumps,-fcrossjumping,-fcaller-saves,-fdevirtualize,-falign-labels,-falign-loops,-falign-jumps,unroll-loops,-fsched-spec,-ffast-math,Ofast,inline,-fgcse,-fgcse-lm,-fipa-sra,-ftree-pre,-ftree-vrp,-fpeephole2",3) #pragma GCC target("avx","sse2") ```