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+\documentclass[aspectratio=169,hyperref={pdfencoding=auto,psdextra}]{beamer}
+\usepackage[utf8]{inputenc}
+\usepackage{CJKutf8}
+\usepackage{ulem}
+\usepackage{graphicx}
+\usepackage{fancyvrb}
+\usepackage{amsmath}
+\usepackage{multicol}
+\usetheme{Malmoe}
+\usecolortheme{default}
+\begin{CJK*}{UTF8}{gbsn}
+\title{「有了他我们无法活」}
+\subtitle{——炮打司令部}
+\author{Chris Xiong}
+\date{2017-07-28}
+\begin{document}
+	\frame{\titlepage}
+	\begin{frame}
+		\frametitle{「有了他我们无法活」}
+		\framesubtitle{Outline}
+		\begin{itemize}
+			\item 采访
+			\item Faster I/O
+			\item C++11 / 14
+			\item Common pitfalls
+			\item Bitmask
+			\item Bitmask+dp
+			\item 如何让队友认错之如何表扬队友
+		\end{itemize}
+	\end{frame}
+	\begin{frame}
+		\frametitle{采访}
+		\framesubtitle{\sout{a.k.a. 教学质量检查}}
+		\begin{itemize}
+			\item 上次课讲的内容大家都听懂了吗？\pause
+			\item 什么？不懂？\pause
+			\item 那还记得上次讲的什么吗？\pause
+			\item 对不起，这次没有A Water Problem
+		\end{itemize}
+	\end{frame}
+	\begin{frame}[fragile]
+		\frametitle{Faster I/O}
+		Why?
+		\begin{itemize}
+			\item No need to parse the format string
+			\item Makes better use of the I/O buffer
+		\end{itemize}
+		\pause
+		How?
+		\begin{itemize}
+			\item \verb|.sync_with_stdio(false)|
+			\item \verb|getchar()|
+			\item \verb|fread()|
+		\end{itemize}
+\end{frame}
+	\begin{frame}[fragile]
+		\frametitle{Faster I/O}
+		\framesubtitle{Faster input - getchar()}
+		\begin{Verbatim}
+		int readint()
+		{
+			int ret=0;
+			char ch=getchar();
+			while(ch<'0'||ch>'9')
+				ch=getchar();
+			do
+			{
+				ret=ret*10+ch-'0';
+				ch=getchar();
+			}while(ch>='0'&&ch<='9');
+			return ret;
+		}
+		\end{Verbatim}
+\end{frame}
+	\begin{frame}[fragile]
+		\frametitle{Faster I/O}
+		\framesubtitle{Even faster input - fread()}
+		\begin{Verbatim}
+		char s[SOME_LARGE_VALUE];
+		size_t ptr,len;
+		len=fread(s,1,SOME_LARGE_VALUE,stdin);
+		int readint()
+		{
+			//replace getchar() with s[ptr++]
+			...
+		}
+		\end{Verbatim}
+		\pause
+		Reading real numbers?
+\end{frame}
+	\begin{frame}[fragile]
+		\frametitle{Faster I/O}
+		\framesubtitle{Faster output}
+		\begin{itemize}
+			\item Print digit by digit
+			\item Save to buffer then \verb|fwrite()| to \verb|stdout|.
+		\end{itemize}
+\end{frame}
+	\begin{frame}[fragile]
+		\frametitle{C++11 / 14 - Useful features that reduces coding efforts}
+		\framesubtitle{C++11}
+		\begin{itemize}
+			\item Uniform initialization
+			\begin{Verbatim}
+	struct S{int a;double b;char c;};
+	S s{1,2.0,'3'};//s.a==1; s.b==2.0; s.c=='3';
+			\end{Verbatim}
+			\item Type inference
+			\begin{Verbatim}
+	std::set<int> s;
+	auto a=1;
+	auto it=s.begin();
+			\end{Verbatim}
+			\item Range-based for loop
+			\begin{Verbatim}
+	std::vector<int> v;
+	for(auto &i:v)...
+			\end{Verbatim}
+		\end{itemize}
+\end{frame}
+	\begin{frame}[fragile]
+		\frametitle{C++11 / 14 - Useful features that reduces coding efforts}
+		\framesubtitle{C++11 cont'd}
+		\begin{itemize}
+			\item Lambda functions
+			\begin{Verbatim}
+std::sort(p+1,p+nv,[o=p[0]](const v3d& a,const v3d& b)->bool
+	{
+		double cross=(a.x-o.x)*(b.y-o.y)-(b.x-o.x)*(a.y-o.y);
+		if(sgn(cross))return sgn(cross)>0;
+		double la=hypot(a.x-o.x,a.y-o.y);
+		double lb=hypot(b.x-o.x,b.y-o.y);
+		return la<lb;
+	}
+);
+			\end{Verbatim}
+			\item Right angle bracket
+			\begin{Verbatim}
+	std::vector<std::pair<int,int>> v;
+			\end{Verbatim}
+			\item \verb|long long int|\\
+			Yeah, it was not standard until C++11 (C99).
+		\end{itemize}
+\end{frame}
+	\begin{frame}[fragile]
+		\frametitle{C++11 / 14 - Useful features that reduces coding efforts}
+		\framesubtitle{C++11 STL}
+		\begin{itemize}
+			\item Hash tables\\
+			\verb|std::unordered_map, std::unordered_set|
+			\item \verb|std::tuple|
+			\item Regular expressions
+			\item Threading
+			\item Random number generators
+		\end{itemize}
+\end{frame}
+	\begin{frame}[fragile]
+		\frametitle{C++11 / 14 - Useful features that reduces coding efforts}
+		\framesubtitle{C++14}
+		C++14 is a small extension to C++11.
+		\begin{itemize}
+			\item Improved \verb|auto|
+			\begin{Verbatim}
+	auto factorial(int x){
+		if(x==1)return 1;
+		return x*factorial(x-1);
+	}
+			\end{Verbatim}
+			\item Improved lambda functions
+			\begin{Verbatim}
+	auto lambda=[](auto x,auto y){return x+y;};
+			\end{Verbatim}
+			\item Lambda capture expressions
+		\end{itemize}
+\end{frame}
+	\begin{frame}[fragile]
+		\frametitle{Common pitfalls}
+		\begin{itemize}
+			\item Huge global variable causes linkage error.
+			\begin{Verbatim}
+int a[1LL<<12][1LL<<48],b[1LL<<12][1LL<<48],c[1LL<<12][1LL<<48];
+int main(){c[0][0]=1;}
+			\end{Verbatim}
+			Compilation result:
+			\begin{Verbatim}
+g++ -Wall -std=c++14 -g -o "test" "test.cpp" -lm (in directory:
+/home/chrisoft/code)
+/tmp/ccOkFQ7A.o: In function `main':
+/home/chrisoft/code/test.cpp:2:(.text+0x6):
+relocation truncated to fit: R_X86_64_PC32 against symbol
+`c' defined in .bss section in /tmp/ccOkFQ7A.o
+collect2: error: ld returned 1 exit status
+Compilation failed.
+
+			\end{Verbatim}
+			\item relocation of \verb|.bss| section exceeding platform limitations.
+		\end{itemize}
+\end{frame}
+	\begin{frame}[fragile]
+		\frametitle{Common pitfalls}
+		\begin{itemize}
+			\item Stack size is very small compared to heap
+			\begin{Verbatim}
+int main(){int a[100000000];...}
+			\end{Verbatim}
+			\item Results in stack overflow.
+			\item Math library
+			\item \verb|memset()| TLE
+		\end{itemize}
+\end{frame}
+	\begin{frame}
+		\frametitle{Bitmask}
+		\begin{itemize}
+			\item A set in its binary form
+			\item Codeforces 550B\pause
+			\item Codeforces 579A
+		\end{itemize}
+	\end{frame}
+	\begin{frame}
+		\frametitle{Bitmask+dp}
+		\begin{itemize}
+			\item Concept of a \textbf{state}\pause
+			\item Value function\pause
+			\item Initial state
+		\end{itemize}
+	\end{frame}
+	\begin{frame}
+		\frametitle{Bitmask+dp}
+		\begin{itemize}
+			\item TSP(Travelling Salesman Problem)
+			\item Given a list of cities and the distances between each pair of cities,
+			what is the shortest possible route that visits each city exactly once and
+			returns to the origin city?\pause
+			\item f[s][i]: s: set of visited cites, i: current city
+			\item functional equation:
+				$
+					f[s][i]=
+					\displaystyle \min_{k:N}f[s-{i}][k]+dist[k][i] (k\notin s)
+				$
+			\item Initial state: f[U][0]=0;\pause
+			\item Variant\pause
+			\item Loop direction
+		\end{itemize}
+	\end{frame}
+	\begin{frame}
+		\frametitle{Bitmask+dp}
+		\begin{itemize}
+			\item TSP: POJ 3311
+			\item Counting: POJ 3254
+			\item f[i][s]: row i with set s occupied
+		\end{itemize}
+	\end{frame}
+	\begin{frame}
+		\frametitle{如何让队友认错之如何表扬队友}
+		\framesubtitle{队友需要表扬才能更有生产力}
+		\includegraphics[scale=0.75]{zz1.png}
+	\end{frame}
+	\begin{frame}
+		\frametitle{如何让队友认错之如何表扬队友}
+		\framesubtitle{光辉事迹}
+		\begin{itemize}
+			\item 比赛中要其他队伍帮忙写对拍
+			\item 比赛中睡3小时觉
+			\item 全权负责实验室事务
+			\item 发说说
+		\end{itemize}
+	\end{frame}
+	\begin{frame}
+		\frametitle{宇宙智障的说说}
+		
+		\begin{multicols}{2}
+		就终于考完试了\_(:зゝ∠)\_\\
+		然而暑假这种？不存在的(滑稽\\
+		还是献给辣鸡的(划掉)acm好了\\
+		学期结束,事儿反而就又突然多了起来\\
+		假装已有计划的专题训练\\
+		各种姿势被虐的多校联合\\
+		以及暑期集训的萌新教学\\
+		与开始正式接手的实验室各种大小事务的锅\\
+		相信,一定会是个忙碌的七八月份吧\\
+		希望,也同会是个充满收获的七八月\\
+		就也会更期待着\\
+		在八月初的短假里\\
+		与小姐姐愉快的玩耍呢\\
+		总之,一定会是个不平凡的假期\\
+		再以及,小姐姐寄的明信片也终于到了:)\\
+		\end{multicols}
+	\end{frame}
+	
+	\begin{frame}
+		\frametitle{宇宙智障的说说}
+		\includegraphics[scale=0.5]{zz2.png}
+	\end{frame}
+	\begin{frame}
+		\frametitle{为何要表扬队友}
+		\begin{itemize}
+			\item 让恬不知耻的队友知道错（似乎对宇宙智障无效）
+			\item 叫醒队友
+			\item \sout{鼓励}队友\sout{WA更多题}
+		\end{itemize}
+	\end{frame}
+	\begin{frame}
+		\frametitle{放假事宜}
+		\begin{itemize}
+			\item 宇宙智障已经畏罪潜逃
+			\item 宇宙智障8月7日将被扭送
+			\item 大家一定不用比宇宙智障回来的早
+		\end{itemize}
+	\end{frame}
+\end{CJK*}
+\end{document}
+
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