先测 Markdown。

一级标题

二级标题

三级标题

单引号斜体

单下划线斜体

双引号加粗

双下划线加粗

删除线

使用反斜线开头的~~_*被当做是普通的*_~~

while True : print(input())

#include<iostream>
using namespace std;
int main(){
    cout<<"Hello World!"<<endl;
    return 0;
}

Markdown 标记区块引用的方法是在行的最前面加>

也可以只在整个段落的第一行最前面加上 >

区块引用内部可以嵌套，只要根据层次加上不同数量的 >即可.

我是内部嵌套区块，我可以使用其他 Markdown 语法哦

我是引用区块内使用标题3语法

     //在引用区块内可以加入代码块
     import java.net.URL;
     import java.util.Arrays;
     import java.util.Date;
     import java.util.Set;

• Red
• Green
• Blue

• Red
• Green
• Blue

• Red
• Green
• Blue

1. Red
2. Green
3. Blue

行内式链接标题

![图片](https://cdn.luogu.com.cn/upload/image_hosting/wmx8njk3.png)

https://yunqian-qwq.github.io/

然后是 $\LaTeX$：

$\dot{a} \ddot{a} \acute{a} \grave{a}$

$\check{a} \breve{a} \tilde{a} \bar{a}$

$\hat{a} \widehat{a} \vec{a}$

$\exp_a b=a^b \exp b=e^b 10^m$

$\sin a \cos b \tan c \sec d \csc e \cot f$

$\arcsin a \arccos b \arctan c$

$\sinh a \cosh b \tanh c \coth d$

$\sh a \ch b \th c$

$\operatorname{argsh} a \operatorname{argch} b \operatorname{argth} c$

$\left\vert a\right\vert \min(x,y) \max(x,y)$

$\min x \max y \inf s \sup t$

$\lim u \liminf v \limsup w$

$\dim p \deg q \det m \ker\phi$

$\Pr j \hom l \lVert z\rVert \arg z$

$dt \mathrm{d}t \partial t \nabla\psi$

$\prime \backprime f^\prime f' f'' f^{(3)} \dot{y} \ddot{y}$

$\infty \aleph \complement \backepsilon \eth \Finv \hbar$

$\Im \imath \jmath \Bbbk \ell \mho \wp \Re \circledS$

$a\equiv1\pmod{m}$

$a\bmod b$

$\gcd(m,n) \operatorname{lcm}(m,n)$

$\mid \nmid \shortmid \nshortmid$

$a\%b$

$\surd \sqrt{2} \sqrt[n]{} \sqrt[n]{x}$

$+ - \pm \mp \dotplus$

$\times \div \divideontimes / \backslash$

$\cdot * \star \circ \bullet$

$\boxplus \boxminus \boxtimes \boxdot$

$\oplus \ominus \otimes \oslash \odot$

$\circleddash \circledcirc \circledast$

$\bigoplus \bigotimes \bigodot$

$\{ \} \emptyset \varnothing$

$\in \notin \not\in \ni \not\ni$

$\cap \Cap \sqcap \bigcap$

$\cup \Cup \sqcup \bigcup \bigsqcup \uplus \biguplus$

$\setminus \smallsetminus \times$

$\subset \Subset \sqsubset$

$\supset \Supset \sqsupset$

$\subseteq \nsubseteq \subsetneq \varsubsetneq \sqsubseteq$

$\supseteq \nsupseteq \supsetneq \varsupsetneq \sqsupseteq$

$\subseteqq \nsubseteqq \subsetneqq \varsubsetneqq$

$\supseteqq \nsupseteqq \supsetneqq \varsupsetneqq$

$= \ne \neq \equiv \not\equiv$

$\doteq \doteqdot \overset{\underset{def}{}}{=} :=$

$\sim \nsim \backsim \thicksim \simeq \backsimeq \eqsim \cong \ncong$

$\approx \thickapprox \approxeq \asymp \propto \varpropto$

$< \nless \ll \not\ll \lll \not\lll \lessdot$

$> \ngtr \gg \not\gg \ggg \not\ggg \gtrdot$

$\le \leq \lneq \leqq \nleq \nleqq \lneqq \lvertneqq$

$\ge \geq \gneq \geqq \ngeq \ngeqq \gneqq \gvertneqq$

$\lessgtr \lesseqgtr \lesseqqgtr \gtrless \gtreqless \gtreqqless$

$\leqslant \nleqslant \eqslantless$

$\geqslant \ngeqslant \eqslantgtr$

$\lesssim \lnsim \lessapprox \lnapprox$

$\gtrsim \gnsim \gtrapprox \gnapprox$

$\prec \nprec \preceq \npreceq \precneqq$

$\succ \nsucc \succeq \nsucceq \succneqq$

$\preccurlyeq \curlyeqprec$

$\succcurlyeq \curlyeqsucc$

$\precsim \precnsim \precapprox \precnapprox$

$\succsim \succnsim \succapprox \succnapprox$

$\parallel \nparallel \shortparallel \nshortparallel$

$\perp \angle \sphericalangle \measuredangle 45^\circ$

$\Box \blacksquare \diamond \Diamond \lozenge \blacklozenge \bigstar$

$\bigcirc \triangle \bigtriangleup \bigtriangledown$

$\vartriangle \triangledown \triangleleft \triangleright$

$\blacktriangle \blacktriangledown \blacktriangleleft \blacktriangleright$

$\forall \exists \nexists$

$\therefore \because \And$

$\lor \vee \curlyvee \bigvee$

$\land \wedge \curlywedge \bigwedge$

$\bar{q} \bar{abc} \overline{q} \overline{abc}$

$\lnot \neg \bot \top$

$\vdash \dashv \vDash \Vdash \models$

$\Vvdash \nvdash \nVdash \nvDash \nVDash$

$\ulcorner \urcorner \llcorner \lrcorner$

$\Rrightarrow \Lleftarrow$

$\Rightarrow \nRightarrow \Longrightarrow \implies$

$\Leftarrow \nLeftarrow \Longleftarrow$

$\Leftrightarrow \nLeftrightarrow \Longleftrightarrow \iff$

$\Uparrow \Downarrow \Updownarrow$

$\leftarrow \rightarrow \nleftarrow \nrightarrow \leftrightarrow \nleftrightarrow \longleftarrow \longrightarrow \longleftrightarrow$

$\uparrow \downarrow \updownarrow \nearrow \searrow \nwarrow \swarrow$

$\mapsto \longmapsto$

$\rightharpoonup \rightharpoondown \leftharpoonup \leftharpoondown \upharpoonleft \upharpoonright \downharpoonleft \downharpoonright \leftrightharpoons \rightleftharpoons$

$\curvearrowleft \circlearrowleft \Lsh \upuparrows \rightrightarrows \rightleftarrows \rightarrowtail \looparrowright$

$\curvearrowright \circlearrowright \Rsh \downdownarrows \leftleftarrows \leftrightarrows \leftarrowtail \looparrowleft$

$\hookrightarrow \hookleftarrow \multimap \leftrightsquigarrow \rightsquigarrow \twoheadrightarrow \twoheadleftarrow$

$\xleftarrow{left} \xrightarrow{right} \xLeftarrow{Left} \xRightarrow{Right} \xleftrightarrow{left\& right} \xLeftrightarrow{Left\& Right}$

$\amalg \% \dagger \ddagger \ldots \cdots$

$\smile \frown \wr$

$\diamondsuit \heartsuit \clubsuit \spadesuit \Game \flat \natural \sharp$

$\diagup \diagdown \centerdot \ltimes \rtimes \leftthreetimes \rightthreetimes$

$\eqcirc \circeq \triangleq \bumpeq \Bumpeq \doteqdot \risingdotseq \fallingdotseq$

$\intercal \barwedge \veebar \doublebarwedge \between \pitchfork$

$\vartriangleleft \ntriangleleft \vartriangleright \ntriangleright$

$\trianglelefteq \ntrianglelefteq \trianglerighteq \ntrianglerighteq$

$\LaTeX$

$a^2$

$a_2$

$a^{2+2} a_{i,j}$

$a^2_2$

${}^2_1\!X^3_4$

$\dot{x} \ddot{x}$

$\vec{x} \overleftarrow{AB} \overrightarrow{AB} \widehat{AB}$

$\overset{\frown}{AB}$

$\overline{ABC}$

$\underline{ABC}$

$\overbrace{1+2+\cdots+100}$

$\begin{matrix}5050\\\overbrace{1+2+\cdots+100}\end{matrix}$

$\underbrace{1+2+\cdots+100}$

$\begin{matrix}\underbrace{1+2+\cdots+100}\\5050\end{matrix}$

$\sum_{i=1}^na_i \sum\limits_{i=1}^na_i$

$\prod_{i=1}^na_i \prod\limits_{i=1}^na_i$

$\coprod_{i=1}^na_i \coprod\limits_{i=1}^na_i$

$\lim_{n\to\infty}x_n \lim\limits_{n\to\infty}x_n$

$\int_{-N}^{N}e^x\,dx$

$\iint_M^Ndx\,dy$

$\iiint_M^Ndx\,dy\,dz$

$\oint_Cx^3\,dx+4y^2\,dy$

$\bigcap_1^np \bigcap\limits_1^np$

$\bigcup_1^np \bigcup\limits_1^np$

$\frac{1}{2}=0.5$

$\tfrac{1}{2}=0.5$

$\dfrac{1}{2}=0.5 \dfrac{1}{x+\dfrac{3}{y+\dfrac{1}{5}}}$

$\dbinom{n}{m}=\dbinom{n}{n-m}=C_n^m=C_n^{n-m}$

$\tbinom{n}{m}=\tbinom{n}{n-m}=C_n^m=C_n^{n-m}$

$\binom{n}{m}=\binom{n}{n-m}=C_n^m=C_n^{n-m}$

$\begin{vmatrix}a&b\\c&d\end{vmatrix}$

$\begin{Vmatrix}a&b\\c&d\end{Vmatrix}$

$\begin{bmatrix}a&\cdots&b\\\vdots&\ddots&\vdots\\c&\cdots&d\end{bmatrix}$

$\begin{Bmatrix}a&c\\b&d\end{Bmatrix}$

$\begin{pmatrix}a&c\\b&d\end{pmatrix}$

$\begin{vmatrix} \begin{Bmatrix}A & \\ c & d \end{Bmatrix} & x\\ \dfrac{1}{2} & \begin{matrix} 1 & 2 \\ 3 & 4 \end{matrix} \end{vmatrix}$

$\begin{cases}2x+9y-5z=10\\4x+20y+z=24\\x-\dfrac{1}{2}y+3z=8\end{cases}$

$\begin{aligned}f(x) & = (x + 1)^2 \\ & = x^2 + 2x + 1\end{aligned}$

$\begin{aligned}a_1 & = 1 \\ a_2 & = 2 \\ & \dots \\ a_n & = n\end{aligned}$

$\begin{array}{|c|c||c|}x&y&z\\8&2&4\\2&3&9\\10&\dfrac{3}{4}&\sqrt{3}\\a&b&c\end{array}$

$A B\Gamma\Delta EZH\Theta$

$IK\Lambda MN\Xi O\Pi$

$P\Sigma T\Upsilon\Phi X\Psi\Omega$

$\alpha\beta\gamma\delta\epsilon\zeta\eta\theta$

$\iota\kappa\lambda\mu\nu\xi\omicron\pi$

$\rho\sigma\tau\upsilon\phi\chi\psi\omega$

$\varepsilon\digamma\varkappa\varpi$

$\varrho\varsigma\vartheta\varphi$

$\aleph\beth\gimel\daleth$

$\mathbb{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$

$\mathbf{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$

$\mathbf{abcdefghijklmnopqrstuvwxyz}$

$\mathbf{0123456789}$

$\mathit{A B\Gamma\Delta EZH\Theta}$

$\mathit{IK\Lambda MN\Xi O\Pi}$

$\mathit{P\Sigma T\Upsilon\Phi X\Psi\Omega}$

$\mathit{0123456789}$

$\mathrm{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$

$\mathrm{abcdefghijklmnopqrstuvwxyz}$

$\mathrm{0123456789}$

$\mathtt{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$

$\mathtt{abcdefghijklmnopqrstuvwxyz}$

$\mathtt{A B\Gamma\Delta EZH\Theta}$

$\mathtt{IK\Lambda MN\Xi O\Pi}$

$\mathtt{P\Sigma T\Upsilon\Phi X\Psi\Omega}$

$\mathtt{0123456789}$

$\mathsf{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$

$\mathsf{abcdefghijklmnopqrstuvwxyz}$

$\mathsf{A B\Gamma\Delta EZH\Theta}$

$\mathsf{IK\Lambda MN\Xi O\Pi}$

$\mathsf{P\Sigma T\Upsilon\Phi X\Psi\Omega}$

$\mathsf{0123456789}$

$\mathcal{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$

$\mathcal{0123456789}$

$\mathfrak{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$

$\mathfrak{abcdefghijklmnopqrstuvwxyz}$

$\mathfrak{0123456789}$

$\scriptstyle\text{ABCDEFGHIJKLMNOPQRSTUVWXYZ}$

$\scriptstyle\text{abcdefghijklmnopqrstuvwxyz}$

$\scriptstyle\text{0123456789}$

$x y z$

$\text{x y z} \text{中文}$

$\text{if }n\text{ is even}$

$(\dfrac{1}{2}) (\dfrac{1}{x+\dfrac{2}{3}})$

$\left(\dfrac{1}{2}\right) \left(\dfrac{1}{x+\dfrac{2}{3}}\right)$

$\left(\dfrac{1}{2}\right)$

$\left[\dfrac{1}{2}\right]$

$\left\{\dfrac{1}{2}\right\}$

$\left\langle\dfrac{1}{2}\right\rangle$

$\left|\dfrac{1}{2}\right|$

$\left\|\dfrac{1}{2}\right\|$

$\left\lfloor\dfrac{1}{2}\right\rfloor$

$\left\lceil\dfrac{1}{2}\right\rceil$

$\left/\dfrac{1}{2}\right/$

$\left\backslash\dfrac{1}{2}\right\backslash$

$\left\uparrow\dfrac{1}{2}\right\uparrow$

$\left\Downarrow\dfrac{1}{2}\right\Downarrow$

$\left\updownarrow\dfrac{1}{2}\right\updownarrow$

$\left<\dfrac{1}{2}\right/$

$\left(\dfrac{1}{2},1\right]$

$\left(\dfrac{1}{2}\right.$

$\left.\dfrac{1}{2}\right]$

$\Bigg(\bigg[\Big\{\big<x\big>\Big\}\bigg]\Bigg)$

$x\!y$

$xy$

$x\,y$

$x\;y$

$x\ y$

$x\quad y$

$x\qquad y$