The Teen GNU/Linux Community

Write a counter function that counts from 1 to max but only returns numbers whose digits don't repeat.

Example:

• 8, 9, 10, 12 (11 is not valid)
• 98, 102, 103 (99, 100 and 101 are not valid)
• 5432, 5436, 5437 (5433, 5434 and 5435 are not valid)

Bonus points:

• Display the biggest jump (in the sequences above, it's 4: 98 -> 102)
• Display the total count of numbers
• Give these two values for max=10000

Email solutions to competition@teenlinux.com (yes the address is working) and/or post in the forum.

I will be posting a summary of the last programming challenge soon!

I'd just like to make all used to the Teen Linux Community aware that tdobson and bjwebb are spearheading a new community for teens who are in support of Digital Freedom in Education and Youth (DFEY), this time it's in real life! For those of you in or around the North West of England there will be a meeting on Sunday 31st August (this coming Sunday) in Manchester. If you're interested in going or want to find out more about DFEY, visit http://dfey.freedomdreams.co.uk/wiki/Main_Page (make sure you check out the details for this weekend's meeting.

I hope to see quite a few of you there,
Rob

Passwords are usually the weakest links in the security chain. It’s all well and good having a 20 character password comprising of the weirdest symbols UTF-8 has to offer, but they are hard to remember. This is why most people come to a compromise, having a password with meaning to them but to the observant bystander it is nonsense. Which is why I put it to you to write a memorable password generator. You can use any method you like, taking words from /usr/share/dict and jiggering them about, taking choice phrases from IRC logs, the possibilities are endless. Remember the strongest passwords contain other characters as well as letters and numbers, and do not contain words found in a dictionary.

As always the most interesting, innovative, and well executed entries will win. The deadline is a fortnight from now, Sunday 17th August. Send your entries to competition@teenlinux.com, all entries will be published unless requested otherwise.

The email address is not yet active, either email me directly or post it in the forum if you don’t mind it being public.

Welcome to the newly formed Teen Linux Community. The Teen Linux Community is the result of the merge of teenLUG and Teen Linux Lounge into one community to aide teen Linux users maintain and develop their use (and enjoyment) of the best operating system in the world.