Count Beautiful Substrings in a String | Efficient C++ Solution for LeetCode Hard Problem

Learn how to solve the **"Beautiful Substrings"** problem using an optimized C++ approach. This problem involves counting substrings where the number of vowels equals the number of consonants and their product is divisible by a given integer `k`. Perfect for coding interviews and Leetcode practice! ✔️ **Problem Highlights:** * Prefix sum and hash map technique * Efficient O(n) solution * Suitable for strings up to 50,000 characters ✅ Includes step-by-step explanation and clean code in C++. --- #cpp #codinginterview #leetcodehard #substring #vowels #consonants #cppprogramming #stringproblems #datastructures #competitiveprogramming