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Re:自己写的第K的居然TLE。。。

Posted by SEI069049 at 2010-06-08 20:54:15 on Problem 2623
In Reply To:自己写的第K的居然TLE。。。 Posted by:lcjh at 2010-03-22 21:06:42 
同感，我用C++和Java两种语言分别写找出第K小元素的方法，结果无情的TLE，但是直接用自己写的MergeSort方法（归并排序），排序后再计算，却能AC。根据算法时间复杂度分析，后者是O(n * log(n))，而前者是O(n)，结果确实令人疑惑，但是从我的实现来看，找出第K小元素的方法采用递归，也许是时间耗费在递归上，其它的原因就不得而知。
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