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描述Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return thelength of last word in the string.If the last word 阅读全文
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描述Given an absolute path for a file (Unix-style), simplify it.For example,path = "/home/", => "/home"path = "/a/./b/../../c/", => "/c"Corner Cases:• D 阅读全文
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描述Given an array of strings, return all groups of strings that are anagrams.Note: All inputs will be in lower-case.分析Anagram（回文构词法）是指打乱字母顺序从而得到新的单词，比如 阅读全文
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描述The count-and-say sequence is the sequence of integers beginning as follows:1, 11, 21, 1211, 111221, ...1 is read off as "one 1" or 11.11 is read of 阅读全文