LeetCode 567. Permutation in String in Java https://leetcode.com/problems/permutation-in-string/
In this problme we need to find out if a permutation of a string s1 is in the s2 string.
If interested in my approach and comments I invite you to check out the following post in my blog:
https://www.johncanessa.com/2021/11/09/permutation-in-string/
Keep in mind that one of the best ways to learn and refresh concepts is to read and experiment. Practice makes perfect.
Enjoy;
John