Get Max Alternating Music

Amazon Music is working on harmonizing their music playlist.

In their playlist system, each song is represented by a binary string music, where '0' and '1' denote two different types of music, say TypeA and TypeB. An "alternating music string" is one where no two adjacent songs are of the same type. For example, "1", "0", "10", "01", "101" are alternating music strings.

Given a binary string music representing the playlist and an integer k, you can perform up to k operations where each operation involves flipping a character, i.e., turning '0' into '1' and '1' into '0'.

As a developer at Amazon, the task is to determine the longest alternating substring that can be created from the music string by performing at most k operations.

Note:

• A binary string is a sequence of '0' and '1' characters.
• A string A is a substring of a string B if A can be obtained from B by deleting several (possibly, zero or all) characters from the beginning and several (possibly, zero or all) characters from the end.