https://www.geeksforgeeks.org/multimap-associative-containers-the-c-standard-template-library-stl/ Multimap in C++ Standard Template Library (STL) - GeeksforGeeks A Computer Science portal for geeks. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. www.geeksforgeeks.org -..