\def{\s}{2pt} \def{\t}{2pt} \mathclap{ \color{#ccc} \begin{array}{c:c|c:c|c:c|c:c|c:c|c:c|c:c|c:c|c:c|c:c|} \kern{\s} & \kern{\s} & \kern{\s} & \kern{\s} &\kern{\s} & \kern{\s} & \kern{\s} & \kern{\s} & \kern{\s} &\kern{\s} & \kern{\s} & \kern{\s} & \kern{\s} & \kern{\s} &\kern{\s} & \kern{\s} & \kern{\s} & \kern{\s} & \kern{\s} & \kern{\s} & \cr[\t]\hdashline \cr[\t]\hline \cr[\t]\hdashline \cr[\t]\hline \cr[\t] \end{array} } \def{\b}{-3pt} \mathclap{ \begin{aligned} \Huge \textrm{\color{FFd700}\texttt L\kern{-2px}\color{FFd700}\texttt o\kern{-2px}\color{FFd700}\texttt w } \textrm{\color{FFd700}\texttt C\kern{-2px}\color{FFc700}\texttt o\kern{-2px}\color{FFb600}\texttt m\kern{-2px}\color{FFa500}\texttt p\kern{-2px}\color{FF8400}\texttt l\kern{-2px}\color{FF6400}\texttt e\kern{-2px}\color{FF4300}\texttt x\kern{-2px}\color{FF2200}\texttt i\kern{-2px}\color{FF1000}\texttt t\kern{-2px}\color{FF0000}\texttt y \color{FF0000}\texttt R\kern{-2px}\color{FF0000}\texttt o\kern{-2px}\color{FF0000}\texttt u\kern{-2px}\color{FF0000}\texttt n\kern{-2px}\color{FF0000}\texttt d} \cr[-17pt] \huge\color{purple}\underline{\kern{176pt}} \cr[-13.3pt] \huge\color{purple}\underline{\kern{176pt}} \cr[5pt] \Huge\color{yellowgreen}\textrm{壹} \end{aligned} }
比赛公告
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$$\Large\texttt{\color{red}A}\to\texttt{\color{yellowgreen}B}\to\texttt{\color{gold}D}\to\texttt{\color{purple}C}$$
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## 比赛信息
本场比赛是 $\textrm{\color{FFd700}\texttt L\color{FFd700}\texttt o\color{FFd700}\texttt w } \textrm{\color{FFd700}\texttt C\color{FFc700}\texttt o\color{FFb600}\texttt m\color{FFa500}\texttt p\color{FF8400}\texttt l\color{FF6400}\texttt e\color{FF4300}\texttt x\color{FF2200}\texttt i\color{FF1000}\texttt t\color{FF0000}\texttt y \color{FF0000}\texttt R\color{FF0000}\texttt o\color{FF0000}\texttt u\color{FF0000}\texttt n\color{FF0000}\texttt d}$ 中第一场比赛，也是 $\texttt{LCOI}$ 出题组举办的第一场公开赛，简称 $\texttt{\color{red}L\color{yellowgreen}C\color{purple}O\color{gold}I\color{black} RI}$。题目为 $\texttt{USACO}$ 风格，欢迎大家参加。
鉴于本比赛在春节前不久，题目较简单，但也有一定的思维难度，欢迎大家来此享受切题的快乐。
比赛时长：\texttt{3.5} 小时。
赛制：\texttt{IOI}。
题目难度：绿题至紫题。
负责人：\texttt{peterwuyihong}。
题目信息
| \texttt{Problem number} |
\color{red}\texttt{A} |
\color{yellowgreen}\texttt{B} |
\color{purple}\texttt{C} |
\color{gold}\texttt{D} |
| \texttt{Name} |
\color{red}\texttt{Cow\ Insertion} |
\color{yellowgreen}\texttt{Cow\ Merger} |
\color{purple}\texttt{Cow Function} |
\color{gold}\texttt{Cow Dance} |
| \texttt{Problem by} |
\color{red}\texttt{zdcqwq2010} |
\color{yellowgreen}\texttt{冷月葬T魂} |
\color{purple}\texttt{peterwuyihong} |
\color{gold}\texttt{peterwuyihong} |
| \texttt{Check by} |
\color{red}\texttt{little\_cindy} |
\color{yellowgreen}\texttt{little\_cindy} |
\color{purple}\texttt{\_I°Fear} |
\color{gold}\texttt{蒋金洲} |
| \texttt{Std by} |
\color{red}\texttt{33DAI} |
\color{yellowgreen}\texttt{冷月葬T魂} |
\color{purple}\texttt{peterwuyihong} |
\color{gold}\texttt{peterwuyihong} |
| \texttt{Data by} |
\color{red}\texttt{little\_cindy} |
\color{yellowgreen}\texttt{冷月葬T魂} |
\color{purple}\texttt{peterwuyihong} |
\color{gold}\texttt{peterwuyihong} |
| \texttt{Solution by} |
\color{red}\texttt{little\_cindy} |
\color{yellowgreen}\texttt{little\_cindy} |
\color{purple}\texttt{peterwuyihong} |
\color{gold}\texttt{peterwuyihong} |
\small\color{grey}\texttt{表格内容较长，请拖动观看}
均采用捆绑测试
其他链接
| 名称 |
链接 |
| 赛时答疑帖 |
\texttt{link} |
| 赛后题解 |
\texttt{link} |
| 知乎评价贴 |
\texttt{link} |
| 题目难度民意调查 |
\texttt{link} |
一些帮助
比赛中，确实有些题需要 \texttt{\_\_int128}，以下提供两个快读方法。
- 标准版
- \texttt{peterwuyihong} 原创
\texttt{RMB} 奖励
一血（由 \texttt{little\_cindy} 提供）
| \color{black}\texttt{Problem} |
\color{black}\texttt{Price} |
| \color{red}\texttt{A} |
\color{red}\texttt{2RMB} |
| \color{yellowgreen}\texttt{B} |
\color{yellowgreen}\texttt{2RMB} |
| \color{purple}\texttt{C} |
\color{purple}\texttt{3RMB} |
| \color{gold}\texttt{D} |
\color{gold}\texttt{3RMB} |
第一位 \texttt{AK}：\texttt{4RMB}。
AK（由 \texttt{\_I°Fear} 提供）
若有 x 人 \texttt{AK}，则每人获得 \left\lfloor\dfrac{10}{x}\right\rfloor 元。如果超过 10 位则择前 10 名 \texttt{AK}。
抽奖（由 \texttt{\_I°Fear} 提供）
随机抽取 \texttt{5} 名分数大于等于 10 的用户，每人奖励 \texttt{2RMB}。
#include<bits/stdc++.h>
using namespace std;
int x,n=5,seed;
signed main()
{
srand(seed); //seed为T1首A者提交的时间
scanf("%d",&x); //x为符合要求人数
while(n--) printf("%d\n",rand()%(x-1)+1);
printf("spare：%d\n",rand()%(x-1)+1); //备用项，仅在出现重复时使用
return 0;
}
特殊排名（由 \texttt{little\_cindy} 提供）
第 11、45、14 名分别获得 \texttt{1RMB}。
备注：可以叠加，若比赛后72小时不领取视为放弃奖品
仅支持微信支付
最后希望题目能够进入主题库。