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Design question: News Feeds

March 19, 2017 Annita 0

Question To make it simple, let’s focus on designing news feed system for Facebook since different products have different requirements. To briefly summarize the feature, […]

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Design question: POI

March 19, 2017 Annita 0

FB/Uber likes this one. A point of interest, or POI, is a specific point location that someone may find useful or interesting. Read More on […]

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Integer to English Words

March 19, 2017 Annita 0

Problem description: A non-negative Convert integer to its English words representation. Given input is guaranteed to be less than 231 – 1 Examples , 123 Hundred […]

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Implement regular expression matching with support for ‘.’ and ‘*’

March 19, 2017 Annita 0

这题很多人都被问过,很多人都背了答案,但是很重要的事要知道算法复杂度。很多人洋洋洒洒写出来后被拒还不知道为什么。 Regular Expression Matching Implement regular expression matching with support for ‘.’ and ‘*’. ‘.’ Matches any single character. ‘*’ Matches zero or more of the preceding element. […]

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