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Walrus operator To finalize previous post. ```python n = 0 while (s := input()).lower() != "конец": n += 1 print(n) ``` I think, it's the most elegant approach. But it uses "walrus operator" which appeared only in python

De Morgan's rule One of the subscribers brought me a problem. Roughly, it sounds like this: “Read standard input and count strings. Stop counting when the user enters конец or КОНЕЦ.” The question was how to write the lo

Algorithm Flood In comments you can bring interesting programming tasks and discuss it

Qbasic and polar coordinates I think it's quite a controversial take. Progress gives us far more powerful computers, instruments nobody could imagine 5 years ago. And still qbasic feels like the best way to start writing

Word of the day: spendthrift Spend means “to give away”, thrift — “to keep”. If you know these words, spendthrift may sound like “keep your money while you can”. And that would be totally wrong. Spendthrift means to spen

Sine cosine machine I’m a physicist, and for me sine and cosine are first and foremost laws of motion: the horizontal and vertical shadows of a pin on the edge of a rotating disc, cast on a wall. Some time ago I decided

Sunflowers. MapReduce. P.S. While writing this post, I realized this algorithm can be improved. There’s some unnecessary work: first I build a (x, y) → h dictionary, and then I rebuild it into h → [(xi, yi), …]. We can g

MapReduce in The Farmer Was Replaced Code discussion. Part II. In the [previous post](<https://t.me/phys_math_dev/86>) we discussed [the code](<https://github.com/tarstars/tfwr/blob/main/sunflowers_ach.py>) which uses ma

Competitive programming guides. When somebody asks about best guides for competitive programming, my first reaction is: * [A. Shen: "Programming: theorems and problems"](<https://sch57.ru/files/pub/prog/Programming_theor

Word of the day I’m in ɔ of this world. Three letters → one ɔ.

GBDTE presentation. Unstable class. I’m working now on a presentation for my upcoming public talk. Here’s a picture that illustrates a small but telling idea: an applicant with exactly three unique phone numbers in their

MapReduce in The Farmer Was Replaced Code discussion. Part I. 27 years ago Google was born. One of its key ideas was PageRank – a “credibility” score for a web page. ([the paper](<https://snap.stanford.edu/class/cs224w-r

Sunflower achievement We have already started to discuss multidrone programming. I applied this technique to get the "Sunflower" achievement. I'm not quite happy with the code yet, but here we are: it works. [code](<http

Heteronym of the day SOW 🐷 noun: "female pig", sound: /saʊ/ 🐷 verb: "to plant seeds", sound: /soʊ/

sin(a+b), cos(a+b) Hello everyone! Today, while doing my dishes, I suddenly realized that sin and cos of a sum can be derived through the consecutive matrix multiplication. But I definitely remember that in school our te

the point of no return has been crossed 🔪The Rubicon has been crossed. 🔪We've crossed the point of no return. 🔪There’s no turning back now. 🔪The die is cast. 🔪The bridge behind us has been burned. So, except "The die is

A short update on GBDTE presentation. The die is cast. I set the date for my presentation on Gradient Boosted Decision trees. It's Jan 15. I'm aiming for a 45 minutes presentation, so like 30 slides to make. The timeline

Programming flood To discuss programming tasks in comments