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题目如下： A happy string is a string that: consists only of letters of the set ['a', 'b', 'c']. s[i] != s[i + 1] for all values of i from 1 to s.length - 阅读全文
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题目如下： Given an array of integers nums, you start with an initial positive value startValue. In each iteration, you calculate the step by step sum of s 阅读全文
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题目如下： HTML entity parser is the parser that takes HTML code as input and replace all the entities of the special characters by the characters itself. 阅读全文
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题目如下： Given the array queries of positive integers between 1 and m, you have to process all queries[i] (from i=0 to i=queries.length-1) according to t 阅读全文