It's a clever solution, so you ask this:

a+b <= c

a+c <= b

b+c <= a

For that loop, but I think it would be better with a+c "<" b.

Because, it's part of triangle existence theorem.

It's a good solution.
I didn't know about filter function only needs a conditional to filter lists.

Well. It was more simple solution than mine.

It's a method to ignore specific values.

For instance:

a,_,b = (1,2,3)
Then: a=1 and b=3
Another example:

a,*_, b = (1,2,3,4,5,6,7,8)
a = 1 and b = 8

Other function to this is save the last result in "_" variable.

So if you do this:

2+4 -> result= 6

_ -> result= 6 #save the last result in your program.

For separate numbers:

a=100000 #it's confuse to see how many zeros are there.

But you can do:

a= 10_000 #it's the same, but more understandable.

This link helps so much: https://www.datacamp.com/tutorial/role-underscore-python

It's a great and clever solution, you don't need to add new variables.
You just use the last element of the list.

And you are very intelligent to put in the second order this: item != res[-1]

Because of the lazy evaluation. Only it's evaluated the first bool result if it's a empty list
so you don't need to worry of the second one.

Thank you :)

Than you, for not convert it to numbers again.

Well, I was convert it to string again, after I sorted numbers.

But, according to python docs:

**sort(): Strings are sorted alphabetically, and numbers are sorted numerically.**

So it's unnecessary to try to convert it to a number again. because sort() and sorted() do the same thing with integers and strings, but only if both are numbers.

There is a rule, "simple is better than complex".
It's due to is more simple do code inside of def function
rather than do a lambda function.

But it's definetly very clever solution :)

I did the same answer but I think it's was not needed.
this statement: if char in char_dict ...

Because dicts update his values in the same char spot.