Solution: Total Appeal of a String
Explore how to calculate the total appeal of a string by summing unique character counts across all substrings. Understand how hash maps track character occurrences to optimize this calculation and implement an O(n) time complexity solution. This lesson helps you grasp the role of hash maps in counting distinct characters for coding interview problems.
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