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I found an answer from stackoverflow.com

Easy interview question got harder: given **numbers 1**..100, find the ...

Use Newton's identities **to** compute coefficients **from b**i; **call** them ci. ... For varying
k, find a prime n <= q < 2n using e.g. Miller-Rabin, and perform the steps with **all**
**numbers** reduced modulo q. ... We then run the **following** pseudo-code algorithm:
... convenient **value** that we know **is** already present **in** the array - **after this** step, ...

For more information, see Easy interview question got harder: given **numbers 1**..100, find the ...

I found an answer from en.wikipedia.org

Network effect - Wikipedia

**In** economics, a network effect **is** the phenomenon **by** which the **value** or utility a
user derives ... **This** effect **is** separate **from** effects related **to price**, such as a
benefit **to** ... president of Bell **Telephone**, **in** gaining a monopoly **on** US **telephone**
services. ... **After** a certain **number** of people **have** adopted the technology,
network ...

For more information, see Network effect - Wikipedia

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