How do I remove duplicates with std::map?

In C++, using `std::map` is an efficient way to remove duplicates from a collection of data. A `std::map` is a sorted associative container that contains key-value pairs with unique keys, meaning that if you try to insert a duplicate key, it will not be added to the map. Here’s how you can use `std::map` to remove duplicates from a vector of integers:

#include <iostream> #include <vector> #include <map> int main() { std::vector<int> nums = {1, 2, 3, 1, 2, 4, 5}; std::map<int, bool> uniqueMap; for (int num : nums) { uniqueMap[num] = true; // Store keys } std::cout << "Unique elements are: " << std::endl; for (const auto &pair : uniqueMap) { std::cout << pair.first << " "; } return 0; }

C++ std::map remove duplicates unique elements associative container

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