cpp

#include <iostream>
#include <map>
#include <array>


int main() {
    std::array<int,7> inArray = {2,3,4,4,5,2,4};
    std::map<int,int> sumElements;

    for(auto& element : inArray)
        sumElements[element]++;

    for(auto& [key, value] : sumElements)
        std::cout << key << " wystapil: " << value << std::endl;
}