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现在的主流的互联网应用越来越依赖streaming data来提供用户一些interesting statistics insights。以linkedin为例，最近90天有多少人看过你的linkedin profile。看过你profile的人都是什么job title，他们都在那些公司工作。 阅读全文
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Problem Statement Given a pattern and a string str, find if str follows the same pattern. Here follow means a full match, such that there is a bijecti 阅读全文
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Problem Statement Given two strings s and t, determine if they are isomorphic. Given two strings s and t, determine if they are isomorphic. Two string 阅读全文
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Problem Statement Given a pattern and a string str, find if str follows the same pattern. Here follow means a full match, such that there is a bijecti 阅读全文
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Problem Statement In a 1 million by 1 million grid, the coordinates of each grid square are (x, y) with 0 <= x, y < 10^6. In a 1 million by 1 million 阅读全文
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Hello 大家好！ 决定开一个国内的包子培训的博客，因为发现blogger在国内是被屏蔽的，Youtube早已被屏蔽，然后优酷实在是太沙雕了，基本处于一种不可用的状态，所以果断转向B站 (对于一个中年大龄程序员来说通过b站的二次元考试实在是不容易啊。。。), 以后主要通过这里来跟大家交流。大家如果 阅读全文