Помагите информатика, алгоритмы..

uinput = input('трёхзначное натуральное число: ') # 123

numbers = [int(i) for i in uinput] # [1, 2, 3]

highest = max(numbers) # 3

lowest = min(numbers) # 1

numbers.pop(numbers.index(highest)) # [1, 2, 3] = [1, 2]

numbers.pop(numbers.index(lowest)) # [1, 2] = [2]

middle = numbers[0] # 2

# print(highest, lowest, middle) 3 1 2

num1 = str(highest) + str(middle) # '32'

if lowest == 0:

~~~~if middle == 0:

~~~~~~~~num2 = str(highest) + str(lowest)

~~~~else:

~~~~~~~~num2 = str(middle) + str(lowest)

else:

~~~~num2 = str(lowest) + str(middle) # '12'

print(num1 + ' - ' + num2 + ' = ' + str(int(num1) - int(num2))) # 32 - 12 = 20

//PascalABC.NET версия 3.2, сборка 1389
//Если программа не запускается, то обновите версию
uses System.Linq;
begin
    writeln('III');
    var a := ReadArrInteger('Документы', ReadInteger('n=')).ToList;
    writeln;
    
    while a.Any() do
    begin
        write(a[0], ' ');
        a.RemoveAt(0);
        if not a.Any then break;
        
        write(a.Last, ' ');
        a.RemoveAt(a.Count - 1);
        if not a.Any then break;
        
        var n := 0;
        if a.Count > 1 then n := a.Count div 2 - 1;
        write(a[n], ' ');
        a.RemoveAt(n);
    end;
end.