#include <iostream>
#include <vector>

using namespace std;

void my_sort(auto &a, auto cmp, auto my_swap)
{
    for (int i = 0; i < a.size(); ++i)
    {
        auto prev = begin(a);
        for (auto j = begin(a); j != end(a); ++j)
        {
            if (cmp(*j, *prev))
                my_swap(*j, *prev);
            prev = j;
        }
    }
}

int main()
{
    vector<int> a;
    int n = 10;
    for (int i = 0; i < n; ++i)
        a.push_back(i);
    my_sort(a,
    [](auto a, auto b)
    {
        return a > b;
    },
    [](auto &a, auto &b)
    {
        a ^= b ^= a ^= b;
    }
    );

    for (int i = 0; i < n; ++i)
        cout << a[i] << ' ';
    return 0;
}