multimap

Multimaps can be a bit of a hidden gem in C++'s Standard Template Library (STL). While we often think of maps as neat, organized collections of unique keys paired with values, multimaps take this concept and add a twist. They allow multiple values to be associated with the same key, opening up a world of possibilities for data organization and retrieval.

In this chapter, we’ll dive deep into multimaps, exploring their structure, functionalities, and practical applications. By the end, you’ll have a solid understanding of how and when to use them effectively.