NP章第三题 首先，可知STINGY SAT的解可以在多项式的时间内得出，因此属于NP，另外很容易得知SAT可以归为STINGY SAT问题，于...

Description Sort a linked list in O(n log n) time using constant space c...

背景 有一个项目，今年12月份开始重构，项目涉及到了socket。但是socket用的是以前一个开发人员封装的包（这个一直被当前的成员吐槽为什么...

Description Given an unsorted array of integers, find the number of long...

Description You are given coins of different denominations and a total a...

Description Given a binary tree Populate each next pointer to point to i...

Description Given a non negative integer number num. For every numbers i...

Description Given a nested list of integers, implement an iterator to fl...

Description Given a binary tree, write a function to get the maximum wid...