leetcode2sumc Leetcode 2020 刷刷Leetcode并作纪录

leetcode 2 sum c Leetcode练习记录这个专案主要存放我练习Leetcode有针对难度分类的集合题库(Collection Question)准备方式分析tag的热门标签，熟悉各个标签解题的思路(解决该标签全部的easy和medium为主)，再根据各个标签建立hackmd笔记，纪录自己解决的过程。各类别题目笔记Array Index Question Name Type Note C++Java Go Comment 33 Search in Rotated Sorted Array medium O 54 Spiral Matrix medium O 66 Plus One easy O O 118 Pascal's Triangle easy O O 119 Pascal's Triangle II easy O要满足只用一个array大小空间O(k) k为input大小来完成，须具备backtracking概念151 Reverse Words in a String medium O这题有点算是easy的程度,目前解法为O(n^2)的时