Geek Pop Quiz, Even More Recent Samba Edition!

Really stupid question.

I have a number of samba shares.
These shares have a number of folders.
I want users to be allowed to do anything they want *inside* the folders, but not be able to move, delete, or rename the existing folders, and not create new folders.

This has to be a file permissions thing on the back end. What's the magic spell I'm looking for with chmod/chgrp so that users can create things INSIDE the folders but not touch the folders themselves?

(no subject)

Firefighter shoots cyclist in head to teach him not to ride on a busy street

Geeky awesomeness.

Wherein I lose half my audience because I'm geeky, but I usually make sense to laypersons:

"Russian peasants multiply using a most curious method. They start by writing the two numbers to be multiplied at the head of two columns. Then they repeatedly divide the number in the left column by two (dropping any remainder) and double the number in the right column, writing the two new numbers immediately below their predecessors, until the number in the left column is one. Then they cross out all rows where the number in the left column is even, and add the remaining numbers in the right column, which is the desired product. For instance, the product eighteen times twenty-three is found like this."



Your challenge:
Are they right to do so?
Can you explain why/why not?

(I know the right answer to both questions, for the record. But this still makes me happy)

(no subject)