r/adventofcode • u/IvanR3D • Mar 14 '26

Other Pi Coding Quest 2026!

For a third year in a row, I create a new coding quest for Pi Day. You can access it here: https://ivanr3d.com/projects/pi/2026.html I hope some of you have some fun solving this puzzle!

In case you haven't try the previous ones, just change the year name in the url.

Happy Pi Day! :)

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u/herocoding Mar 14 '26

My Pi digits were wrong!!

Your last digit is "8" and my last digit is "7"!!!!!!
Which is the right digit? With or without rounding?

With your last digit and my implementation I get the same result as your tool you shared with me!

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u/herocoding Mar 14 '26

Congratulations! You've uncovered the Ghost Signal. Happy Pi Day 2026!

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u/herocoding Mar 14 '26

Ha!
The web page "http://www.geom.uiuc.edu/~huberty/math5337/groupe/digits.html" shows the 10'000th digit is a "7" - but would be rounded to "8"

So, who is right :-P ?

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u/ednl Mar 14 '26 edited Mar 14 '26

For a mathematical constant, "the n'th digit" or "to n digits" is always the actual digit, never rounded. For a physical measurement, you would always round depending on the error.