#include <algorithm>
#include <iostream>
#include <iterator>
#include <vector>

int main()
{
    std::cout << "Enter n: ";

    unsigned n { };
    std::cin >> n;

    std::cout << "Enter values: ";

    std::vector<int> values { };
    for (unsigned i { 0 }; i < n; ++i)
    {
        int value { };
        std::cin >> value;
        values.push_back(value);
    }
    std::sort(values.begin(), values.end());

    int target { };
    std::cout << "Enter target sum: ";
    std::cin >> target;

    std::vector<std::pair<unsigned, unsigned>> sums { };

    // Skriv din kod här

    if (sums.empty())
    {
        std::cout << "No elements sum up to " 
                  << target << std::endl;
    }

    for (auto [i, j] : sums)
    {
        std::cout << values[i] << " + " << values[j]
                  << " = " << target << std::endl;
    }
}