Solution: Total Appeal of a String
Explore how to efficiently calculate a string's total appeal by summing unique character counts across all substrings. Understand how to use a hash map to track characters’ last occurrences and apply this to avoid redundant counting. This lesson helps you implement a linear time algorithm, improving your grasp of hash maps and substring computations in coding interviews.
We'll cover the following...
We'll cover the following...
Statement
Given a string s, return its total appeal, which is calculated by summing the appeals of all its
The appeal of a string is defined as the count of unique characters present in that string.
For instance, the appeal of “xyzxz” is