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

struct Endpoint
{
    double value { };
    bool is_end { };
};

int main()
{
    std::vector<Endpoint> endpoints { };
    std::cout << "Enter n: ";

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

    std::cout << "Enter intervals: ";

    for (unsigned i { 0 }; i < n; ++i)
    {
        double begin { };
        double end   { };

        std::cin >> begin >> end;

        endpoints.push_back(Endpoint{ begin, false });
        endpoints.push_back(Endpoint{ end  , true  });
    }

    /* Lös uppgiften här */

}