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Left hand rule in The Farmer Was Replaced When I first solved the TFWR maze, I reached for DFS without thinking. But when I tried to explain the game to a less seasoned programmer, I realized DFS quietly assumes you’re c
2D insertion sort. Implementation. In the previous post I described a nice 2D array sorting approach based on insertion sort. Today you can see how it behaves in practice — watch the video. I personally love this kind of
2D sort In The Farmer Was Replaced there is a subgame in which you are to sort a 2D field. I tried several options and liked the 2D insertion-sort algorithms the most. It’s exactly what I want to speak about today. First
Group emblem Nobody asked me, but I’ll tell you how the channel emblem was born: one quick pen sketch + a single prompt in ChatGPT. ``` It's an approximate version of the sign for telegram channel. Channel name is phys_m
EGBDT Logloss - Learning curves There were already two posts about the synthetic LogLoss dataset. [The latest.](<https://t.me/phys_math_dev/68>) Let's discuss an experiment with this dataset. The dataset has two groups
NotebookLM I’m working on a presentation about gradient-boosted decision trees. It’s definitely not my first rodeo: I’ve made decks in LaTeX/Beamer, Word, PowerPoint… probably a few other things too. These days it feels
For TFWR solutions discussions In comments to this message we are conducting code review for The Farmer Was Replaced programs
New school level physics problem There is an old physics problem: two holes in the wall of a jar with liquid. The depth of the first hole is x, the second is y. You are to find: the horizontal distance from the jar wall
Not exponential. This time. Guys, there’s always an exponential lurking somewhere. When the rate is proportional to the amount, the amount decays exponentially: a capacitor discharging through a resistor, detergent washi
Pouring-out velocity When solving physics problems at school, I used a standard formula for the velocity of a jet pouring out of a hole, given the pressure inside the liquid and its density. But for a long time I couldn’
Water jets In my childhood library there were many DIY books. One of them, written for young pioneers, described a small setup that demonstrates how jet velocity depends on pressure. At some point I managed to find three
2025 in a nutshell. Kinda... As the owner of this channel and its promoter, I hang out in a lot of Telegram channels. Now there are many posts with promises for the next year. I definitely don’t want to make the gods lau
English joke of the day Vegetarian eats vegetables. Guess what’s for the humanitarian.
Cannabis curve There is a [special page](<https://mathworld.wolfram.com/CannabisCurve.html>) on Wolfram MathWorld dedicated to a very specific equation in polar coordinates. ``` r(θ) = a·[1 + 9/10·cos(8θ)]·[1 + 1/10·cos(
[Chat for discussions](<https://t.me/phys_math_dev_chat>) Feel free to discuss things there [invitation link](<https://t.me/+Au96VWrWbB5iYmIy>)
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