Increadiable, No more to say !

Interesting solution !
To have this kind of solution I guess it needs to be good in math, you used Gauss Summation Formula and give some elegance by bitwise stuff. Nice !

Wow ! Nice solution ! Elegant using of math function ! Bravo !

I learnt some new things from your example, thanks ! :)

I guess it just needs the knowledge of math, And better explanation of task, coz it's not clear at all.

Mine solution is a bit shorter but equal perfomence and general approach ... it's past all the tests but,
it's better go with sorting and not direct modifying of a list. It will go more verbose, but will have better perfomence.

Short and working =) Every letter stays for the dozen so F from 1-60 it needs 6 dozen and hence 6 "F" (without devided by 10 you would needed to write 60 "F" instead of 6 LOL) in the String, etc.

So you've created the shortest custom template to get correct result.
Thanks!

Still repeated F is a bit ugly, and if we would have measure like: 1-55 for the F(not 60 as in the task), etc, then this approach would not work. but the shortness worths it in this small case, so... Bravo, it was 100% clever !

Short and mysterious =) Bitwise is good !!

Thank you! I did redudant math import =)

Really nice realization ! Thanks !

Regular expressions give super powers :D

it doesn't need additional imports in your code.

Really cool and concise solution !