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Bounties are like votes; you're supposed to be awarding the points to the exceptional post, not the user. If it appears someone is repeatedly using bounties to give reputation to the same user on posts that do not appear to deserve it, that's probably an abuse.
However mods don't have as good o...
Note, challenge copied from question asked at math.stackexchange.
Recently, I attained quite some skill at blowing bubbles. At first I would blow bubbles like this:
But then things started getting strange:
After a while, I was blowing some pretty weird bubbles:
After blowing hundreds, ma...
Prime Factors that Weren't there Before
Given a list of integers a, calculate the prime factorization for each integer in the array. Then, return a list of factors that do not appear in the original input, even as part of another number. For instance, if you were given:
a = [1243,11311]
The pr...
Maximize the velocity of a group of cars
A group of cars are in the right lane of a straight two lane highway. Each car has a preferred speed. In order to reach this preferred speed, some of the cars need to change lanes, perhaps multiple times.
All cars are exactly 1 meter long. At the start...
