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Challenge: Let's Play with Containers

Explore storing integer key-value pairs in a map of vectors and sorting each vector using STL containers. Understand how to input, process, and output sorted data for each key, reinforcing your grasp of C++ STL container handling and sorting techniques.

Problem statement

You are given an input consisting of key/value pairs, where each key is an integer, and each value is an integer.

Write a function that reads ...