i almost cried, this masterpiece should be in a museum

this is amazing! I didn't know you can do this here

Looks to be pretty slow

Only works on 64 bit then. Not within spec I would say

It absolutely is an increasing sequence. The kata defined 0 as coming after 9 for increasing sequences. The 1 in the end can be safely ignored because a number was defined to have at least three characters

It's beautiful

On my side the regex code is twice as slow as a for loop (2526 ms vs 1149 ms).

Thanks better late than never on the reply :)

I have tested it and it is correct here and in other solutions too)

I do a foreach loop for 1_000_000 repetitions of the "yacht is the sea with a man in the sky" line discussed above, and compare it to regex.
Results:
1280 ms - for loop
1137 ms - regex
the for loop loses an average of 100 ms. LINQ is slower - 1809 ms

Summary: regex is the fastest and most obvious - really best practice)))

I can't even begin to understand how this solution works, it's beautiful T.T

LMAO