std::ranges::nth_element

#include <algorithm>
#include <array>
#include <functional>
#include <iostream>
#include <ranges>
#include <string_view>
 
void print(std::string_view rem, std::ranges::input_range auto const& a)
{
 for (std::cout << rem; const auto e : a)
 std::cout << e << ' ';
 std::cout << '\n';
}
 
int main()
{
 std::array v{5, 6, 4, 3, 2, 6, 7, 9, 3};
 print("Before nth_element: ", v);
 
 std::ranges::nth_element(v, v.begin() + v.size() / 2);
 print("After nth_element: ", v);
 std::cout << "The median is: " << v[v.size() / 2] << '\n';
 
 std::ranges::nth_element(v, v.begin() + 1, std::greater <int>());
 print("After nth_element: ", v);
 std::cout << "The second largest element is: " << v[1] << '\n';
 std::cout << "The largest element is: " << v[0] << "\n\n";
 
 using namespace std::literals;
 std::array names
 {
 "Diva"sv, "Cornelius"sv, "Munro"sv, "Rhod"sv,
 "Zorg"sv, "Korben"sv, "Bender"sv, "Leeloo"sv,
 };
 print("Before nth_element: ", names);
 auto fifth_element{std::ranges::next (names.begin(), 4)};
 std::ranges::nth_element(names, fifth_element);
 print("After nth_element: ", names);
 std::cout << "The 5th element is: " << *fifth_element << '\n';
}

Before nth_element: 5 6 4 3 2 6 7 9 3 
After nth_element: 2 3 3 4 5 6 6 7 9 
The median is: 5
After nth_element: 9 7 6 6 5 4 3 3 2 
The second largest element is: 7
The largest element is: 9
 
Before nth_element: Diva Cornelius Munro Rhod Zorg Korben Bender Leeloo 
After nth_element: Diva Cornelius Bender Korben Leeloo Rhod Munro Zorg 
The 5th element is: Leeloo