Hacker News: varrakesh

New comment by varrakesh in "DeepSeek v4"

varrakesh — Fri, 24 Apr 2026 10:01:47 +0000

China hasn't done anything with Taiwan other than saber-rattling. Hong Kong, Xinjiang, etc. are all part of China.

The US is (mostly) protective of its citizens but (depending on administration) varyingly hostile to outsiders (immigrants, starting wars, etc.).

China is suppressive towards its own citizens, but has been largely peaceful with other countries and immigrants/visitors. (Granted, China has way fewer immigrants than the US, so this is not comparable).

New comment by varrakesh in "Can You Solve This? 1B Records per Second Data Streaming Challenge"

varrakesh — Mon, 09 Sep 2019 23:40:16 +0000

This isn’t well-specified enough to be a real challenge. They say it can be a server - but not too beefy of a server. What does that even mean? If I put eight NVMe SSDs in a 128-core server, is that too beefy? What about 64, 16 cores?

Can I know (or bound) the number of orders or products in advance to preallocate? Can I design the dataset myself with certain assumptions (e.g. sorted with respect to time)? Can I bound certain aspects of the dataset (e.g. orders must not contain more than 255 products, orders always contain the prices of everything, etc.)?

Latency isn’t apparently a factor - so if I’m processing 1B records, do we care how quickly it gets done? If not, I’ll just stream the data off to a GPU and get the results later?

Five-line solution to the Subset-sum problem (Python)

varrakesh — Mon, 25 Feb 2013 10:27:43 +0000

A five-line Python solution to the subset-sum problem (dynamic programming, pseudopolynomial time):

def subset_sum(A, target): T = {0} for i in A: T |= {x + i for x in T} return target in T

Seems to be pretty efficient.

Comments URL: https://news.ycombinator.com/item?id=5278216

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