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<!DOCTYPE html>
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rookiecm
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<div class="post-preview">
<a href="/2020/07/31/山的那边，必然是我所念/">
<h2 class="post-title">
山的那边，必然是我所念
</h2>
<h3 class="post-subtitle">
</h3>
<div class="post-content-preview">
自从最近的某一天开始，失眠问题开始困扰我，彷佛焦虑情绪一下子爆发。这两周的状态糟糕透顶，注意力和敏感度断崖式下跌，学习和科研效率也达到新低。最严重的是，似乎出现了喜怒无常。多年以来，身边的朋友都评价我是个严格的情绪控制者。最近的我会因为一件小事而过分喜悦，甚至直接到操场上一口气跑上15圈；更多的时候会因为非常微小的事情搅乱心绪，整日闷闷不乐。不想给自己贴上“抑郁”的标签，因为似乎这个词语已经......
</div>
</a>
<p class="post-meta" style="margin: 10px 0;">
Posted by Meng Cao on
2020-07-31
</p>
<div class="tags">
</div>
</div>
<hr>
<div class="post-preview">
<a href="/2020/06/15/hangzhouSoHot/">
<h2 class="post-title">
hangzhouSoHot
</h2>
<h3 class="post-subtitle">
</h3>
<div class="post-content-preview">
东京之旅一早比一世遥远
疫情在家5个多月了，赶了2次dealine, 感觉甚是疲惫，和老孙、小紫一拍即合，决定NeurIPS ddl之后安排一场三天的杭州之行。其实作为江苏人，去杭州玩其实也就是家旁边走走。不过作为上次旅行远在2018年5月份的我来说，也算是比较期待的。现在想来2019年暑假因为实习鸽了老孙的台湾之行，甚是后悔。
NeurIPS supplementary materia......
</div>
</a>
<p class="post-meta" style="margin: 10px 0;">
Posted by Meng Cao on
2020-06-15
</p>
<div class="tags">
</div>
</div>
<hr>
<div class="post-preview">
<a href="/2019/08/07/python-broadcast/">
<h2 class="post-title">
python broadcast
</h2>
<h3 class="post-subtitle">
</h3>
<div class="post-content-preview">
广播（broadcasting）
指的是不同形状的数组之间的算术运算的执行方式。
广播的原则：
两个数组从后向前对比，每个维度数组兼容，当：
数值相等
或其中一个数值为1
如果较短的数组维度遍历完毕，则可以广播，否则抛出ValueError: frames are not aligned异常
当比较的任何一个维度为1时，则使用另一个。换句话说，大小为1的维被拉伸或“复制”以匹配另一维。
......
</div>
</a>
<p class="post-meta" style="margin: 10px 0;">
Posted by Meng Cao on
2019-08-07
</p>
<div class="tags">
<a href="/tags/#python" title="python">python</a>
</div>
</div>
<hr>
<div class="post-preview">
<a href="/2019/07/14/一类特殊的BFS/">
<h2 class="post-title">
一类特殊的BFS
</h2>
<h3 class="post-subtitle">
</h3>
<div class="post-content-preview">
通常来说，BFS模版如下：
1234567891011121314151617q = new Queue()seen = new HashSet()q.add(start)seen.add(start)steps = 0while not q.empty(): size = q.size() while size-- > 0: state = q.pop() ......
</div>
</a>
<p class="post-meta" style="margin: 10px 0;">
Posted by Meng Cao on
2019-07-14
</p>
<div class="tags">
<a href="/tags/#算法" title="算法">算法</a>
</div>
</div>
<hr>
<div class="post-preview">
<a href="/2019/07/07/最短路径问题/">
<h2 class="post-title">
最短路径问题
</h2>
<h3 class="post-subtitle">
</h3>
<div class="post-content-preview">
故事不长。
图论中的最短路径问题，通常可以用dijkstra算法，bellman-ford算法和Floyd-Warshall算法。
Dijkstra算法使用广度优先搜索，解决赋权有向图的单元最短路径问题。具体而言，固定一个节点作为源节点，找到该节点到其他节点的最短路径，生成一颗最短路径树。
Dijkstra算法
算法描述
算法维护两个顶点集合 S 和 Q。集合 S 保留所有已知最小 d[......
</div>
</a>
<p class="post-meta" style="margin: 10px 0;">
Posted by Meng Cao on
2019-07-07
</p>
<div class="tags">
<a href="/tags/#算法" title="算法">算法</a>
</div>
</div>
<hr>
<div class="post-preview">
<a href="/2019/06/19/快速幂算法/">
<h2 class="post-title">
快速幂算法
</h2>
<h3 class="post-subtitle">
</h3>
<div class="post-content-preview">
Leetcode 50. Pow(x, n)
Example 1:
Input: 2.00000, 10
Output: 1024.00000
Example 2:
Input: 2.10000, 3
Output: 9.26100
Log(n)的时间复杂度
递归写法：
1234567891011class Solution {public: double myPow(dou......
</div>
</a>
<p class="post-meta" style="margin: 10px 0;">
Posted by Meng Cao on
2019-06-19
</p>
<div class="tags">
<a href="/tags/#算法" title="算法">算法</a>
</div>
</div>
<hr>
<div class="post-preview">
<a href="/2019/06/17/最长递增子序列LIS/">
<h2 class="post-title">
最长递增子序列LIS
</h2>
<h3 class="post-subtitle">
</h3>
<div class="post-content-preview">
300. Longest Increasing Subsequence
Given an unsorted array of integers, find the length of longest increasing subsequence.
Example:
Input: [10,9,2,5,3,7,101,18]
Output: 4
Explanation: The longest ......
</div>
</a>
<p class="post-meta" style="margin: 10px 0;">
Posted by Meng Cao on
2019-06-17
</p>
<div class="tags">
<a href="/tags/#算法" title="算法">算法</a>
</div>
</div>
<hr>
<div class="post-preview">
<a href="/2019/06/14/Leetcode-4-Median-of-Two-Sorted-Arrays/">
<h2 class="post-title">
Leetcode 4. Median of Two Sorted Arrays
</h2>
<h3 class="post-subtitle">
</h3>
<div class="post-content-preview">
以一题多解为荣，以做出来就行为耻。
There are two sorted arrays nums1 and nums2 of size m and n respectively.
Find the median of the two sorted arrays. The overall run time complexity should be O(log (m+n)).
You m......
</div>
</a>
<p class="post-meta" style="margin: 10px 0;">
Posted by Meng Cao on
2019-06-14
</p>
<div class="tags">
<a href="/tags/#算法" title="算法">算法</a>
</div>
</div>
<hr>
<div class="post-preview">
<a href="/2019/06/12/keep-calm-and-code-on/">
<h2 class="post-title">
keep calm and code on
</h2>
<h3 class="post-subtitle">
</h3>
<div class="post-content-preview">
最近有些焦虑，虽然不是很严重，但也是也影响了自己的工作效率。深切的感觉到自己要补的东西还很多，也会去回忆一些曾经做过的选择，从现在这个角度来看其实可以规划得更好。
希望自己能摆脱这样无意义的懊悔，调节好情绪，继续加油。列一下想补充的方向吧：
算法题：多看公开课；多刷题；多看书。
数学：有时间复习一下说概率论与统计，一定要找时间看完herd on the street.
系统方面：csapp......
</div>
</a>
<p class="post-meta" style="margin: 10px 0;">
Posted by Meng Cao on
2019-06-12
</p>
<div class="tags">
<a href="/tags/#随笔" title="随笔">随笔</a>
</div>
</div>
<hr>
<div class="post-preview">
<a href="/2019/06/12/Leetcode-Shell/">
<h2 class="post-title">
Leetcode Shell
</h2>
<h3 class="post-subtitle">
</h3>
<div class="post-content-preview">
192. Word Frequency
Write a bash script to calculate the frequency of each word in a text file words.txt.
For simplicity sake, you may assume:
words.txt contains only lowercase characters and space......
</div>
</a>
<p class="post-meta" style="margin: 10px 0;">
Posted by Meng Cao on
2019-06-12
</p>
<div class="tags">
<a href="/tags/#shell" title="shell">shell</a>
</div>
</div>
<hr>
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<a href="/archives/2/">Older Posts →</a>
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<h5><a href="/tags/">FEATURED TAGS</a></h5>
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<a href="/tags/#算法" title="算法" rel="8">算法</a>
<a href="/tags/#C++" title="C++" rel="2">C++</a>
<a href="/tags/#随笔" title="随笔" rel="2">随笔</a>
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<hr>
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<h5><a href="/about/">ABOUT ME</a></h5>
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<img id = "avatar_pic" src="/img/ironman-draw.png" />
<p>Hi, i'm Cao Meng</p>
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