Solution: Total Appeal of a String
Understand how to calculate the total appeal of a string by summing the appeal of all substrings. Explore using a hash map to track character indices, enabling efficient computation by focusing on first occurrences and avoiding repetitive counting. This lesson provides step-by-step logic and an O(n) time solution for the problem.
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