When working with `std::multiset` in C++, it is important to understand that `std::multiset` manages its memory dynamically and does not provide direct methods for reserving capacity or performing a shrink-to-fit operation like some other containers (e.g., `std::vector`). However, if you are looking to optimize your use of a `std::multiset`, you can consider utilizing its properties and carefully managing insertions and deletions to improve performance.
Here is a basic example demonstrating the use of `std::multiset` to store duplicate values:
#include <iostream>
#include <set>
int main() {
std::multiset ms;
// Insert elements into the multiset
ms.insert(5);
ms.insert(1);
ms.insert(3);
ms.insert(5); // Duplicate element
// Display elements in the multiset
for (const auto& element : ms) {
std::cout << element << " ";
}
std::cout << std::endl;
return 0;
}
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