#include <iostream>
#include <vector>
#include <algorithm>
#include <random>
 
int main() {
    std::vector<int> data{1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
    std::vector<int> sample_result(3);
 
    // Check for the presence of the __cpp_lib_sample macro (appeared in C++17)
#if __cpp_lib_sample
    std::cout << "Using std::sample from C++17." << std::endl;
    std::sample(data.begin(), data.end(), sample_result.begin(), sample_result.size(), std::mt19937{std::random_device{}()});
#else
    std::cout << "std::sample is not supported. Using alternative method." << std::endl;
    // Alternative code for older standards (e.g., manual shuffle and copy)
    std::random_device rd;
    std::mt19937 g(rd());
    std::shuffle(data.begin(), data.end(), g);
    std::copy_n(data.begin(), sample_result.size(), sample_result.begin());
#endif
 
    std::cout << "Selected elements: ";
    for (int n : sample_result) {
        std::cout << n << " ";
    }
    std::cout << '\n';
 
    return 0;
}
 

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