Django. Reordering records for inline forms?

Question

C++ / C#

In the admin panel, you need to set a certain order of entries. For ModelAdmin, I wrote a mixin. It looks something like this:

I want the same for inlafnovyh forms. The logic there is completely different, so you need to understand and draw a separate solution for them.
However, the task is quite common. Most likely, solutions already exist. It doesn't work to explain to Google what exactly I need - it tries hard to tell me about ordering.
If anyone knows of existing solutions for ordering inline form entries, please leave the links.

Answer 1

negative numbers that are greater than -200 are from -200 to 0.
Loop from -200 to zero, sum those that are multiples of 3 (divide by 3 without a remainder).

Answer 2

#include <iostream>
using namespace std;

int main()
{
    int sum = 0;
    for(int i = - 200 ; i < 0 ; i++ )
    {
    	if( i%3 == 0 ) // Если остаток от деления на 3 равен нулю
    	{
            sum+= i;
    	}
    }
    cout<< sum << endl;
    return 0;
}

Answer 3

Perhaps this will help . You can also see the code not far away, as well as a separate battery for this case.