# Two pointers approach #### 2022-06-14 23:06 --- ##### Algorithms: #algorithm #two_pointers ##### Data structures: #array #linked_list ##### Difficulty: #CS_analysis #difficulty- ##### Related problems: ##### Links: - [leetcode](https://leetcode.com/explore/learn/card/fun-with-arrays/511/in-place-operations/) --- ### What is Two pointers approach? By using two pointers, to in place modify array elements. - One fast and one slow [[Leetcode Best-Time-To-Buy-And-Sell-Stock]] or [[Leetcode Linked-List-Cycle]] - The two are unordered [[Leetcode Merge-Two-Sorted-Lists]] ### Why and when to use it? - There are two arrays, or linked lists - They are sorted, or operation in place will not interfere elements after.