Already raised as issue a bucnh of messages below, so closing.

Cheers.

This is good practice, but why don’t you write random tests? How can we know if our solution is correct?

python:
Why do I get the error: "Value is not what was expected"

The code you have written is exceptionally elegant

Your solution is very interesting

realy?

well, from the Example given: 7, 8, 9, 10, 11 will be replaced by 7-11 because it spans at least 3 numbers (here there are 5 numbers).

Meanwhile, 14, 15 would not be replaced since it spans only 2 numbers.

Try to reproduce the Example given, on pen and paper, using the description? Are you able to do it?

Can you get the answer for example: 1, 2, 3, 15, 16, 45, 98, 99, 100, 101, 102 ?

thank u Chrono79. Yes I understood. but i don't know how the ranges are generated?

hi everybody. i don't understand this solution. very strange to me. who it works?!

Take a list and return a string of single numbers or ranges separated by commas, see the example.

hi everybody i don't understand this kata.
what do i do exactly?
my language is python3

Because its runtime scales with the square of the number of elements. Doing something 400 000 000 times can still be fast ( CPUs run at GHZ speeds ). Now feed it a million elements. A million squared is 1 000 000 000 000. That will take ( too much ) time.

You'll need something that scales better. Tests use arguments up to 100 000 long ( in JS, but I guess Python will do similar ).

maybe you are printing somthing

My algorithm does a 20k array in 0.45 seconds. Why is it still slow?