Solution: Total Appeal of a String
Understand how to compute the total appeal of a string by focusing on each character's contribution to substring uniqueness. Learn to implement a hash map to track the last occurrence of characters, enabling efficient calculation of unique character counts across all substrings. This lesson helps you apply these concepts to solve the problem in linear time with constant space.
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