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Grokking the Coding Interview Patterns in Python

Longest Happy String

Explore how to generate the longest happy string that contains only 'a', 'b', and 'c' without three identical consecutive letters. Learn to apply heaps for efficiently managing character counts and constraints, and practice coding this solution to develop problem-solving skills for technical interviews.

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Statement

A string is considered happy if it meets the following conditions:

  1. It comprises only the characters 'a', 'b', and 'c'.

  2. It does not contain the substrings "aaa", "bbb", or "ccc".

  3. The total occurrences of:

    1. The character 'a' does not exceed a.

    2. The character 'b' does not exceed b.

    3. The character 'c' does not exceed c.

You are given three integers, a, b, and c, representing the maximum ...