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Grokking the Coding Interview Patterns in C#

Total Appeal of a String

Explore how to calculate the total appeal of a string by summing the count of unique characters in all its substrings. This lesson helps you understand the concept of string appeal and apply hash maps to efficiently solve this common coding challenge.

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Statement

Given a string s, return its total appeal, which is calculated by summing the appeals of all its substringsA substring is a contiguous sequence of characters within a string..

The appeal of a string is defined as the count of unique characters present in that string.

For instance, the appeal of “xyzxz” is ...