Simple and complex! Your solution open my mind to study streams, u rock dude!

wow

This is a good solution, but not universal :( To fix it, you need to use System.lineSeparator() or System.getProperty("line.separator")

• \n is for unix
• \r is for mac (before OS X)
• \r\n is for windows format

Good luck in your studies! =)

The string <" * " + num + " = "> is the same all the time but built 10 times

this O(logN)

its kata can be solved O(N)

Probably because it would convert CW into a permanent mess / battlefield.

Kyu can't be changed :( I don't get why though.

the .trim() method was clever. I just did the last line manually.

Neat!

Is there a good site/book to learn regex?

Better late than never:-)

Thanks! It took me a while :)

Nice one. Thanks.