[LeetCode] 2272. Substring With Largest Variance

[LeetCode] 2272. Substring With Largest Variance

2272. Substring With Largest Variance Hard The variance of a string is defined as the largest difference between the number of occurrences of any 2 characters present in the string. Note the two characters may or may not be the same. Given a string s consisting of lowercase English letters only, return the largest variance possible among all substrings of s. A substring is a contiguous sequence ..