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

struct Interval
{
    double begin { };
    double end   { };
};

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

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

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

    for (unsigned i { 0 }; i < n; ++i)
    {
        Interval interval { };
        std::cin >> interval.begin >> interval.end;
        intervals.push_back(interval);
    }

    /* Lös uppgiften här */
}