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Cosmin Negruseri
1,448 followers
1,448 followers
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overheard kids on Caltrain:
What's the complexity of A[n]? A[n+1] = A[n]^2 / A[n-1] if n is even and A[n+1] = 2A[n] - A[n-1] if n is odd.

via ycombinator: This was all said very, very well by Machiavelli hundreds of years ago in chapter 6 of The Prince.

"And it ought to be remembered that there is nothing more difficult to take in hand, more perilous to conduct, or more uncertain in its success, than to take the lead in the introduction of a new order of things. Because the innovator has for enemies all those who have done well under the old conditions, and lukewarm defenders in those who may do well under the new. This coolness arises partly from fear of the opponents, who have the laws on their side, and partly from the incredulity of men, who do not readily believe in new things until they have had a long experience of them. Thus it happens that whenever those who are hostile have the opportunity to attack they do it like partisans, whilst the others defend lukewarmly, in such wise that the prince is endangered along with them."

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http://www.infoarena.ro/blog/primegenerator
A while back Ovidiu Gheorghioiu told me this neat problem:

How would you build an efficient prime number generator?

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