Part of Code Golf Advent Calendar 2022 event. See the linked meta post for details. It's Hanukkah! Unfortunately, it appears some of the candles in your menorah have been blown out. You've got a lighter on hand, but it doesn't work quite right. Whenever you use your lighter at position k, the ca...

Community agrees that functions should be reusable while if a function take whole stdin (like while(gets()) in C or fs.readFileSync(0) in nodejs) then it can no longer be used. In this case is it still required to recover environment? A third answer, function don't take whole stdin, can be consid...

Imagine you are building Christmas tree from 1x1x1 sized cubes that can be attached just by sharing a side. At least one input - size, but can be more granular (height, bottom_width, etc.). Think of it as 3d pixel/ascii-art. Any kind of algorithm you like, data representation should be either: S...

Selection and Prediction Premise Challenge: to select from the keys A and B and predict others' selections in an alternating-style koth. All entries should be Python 3.10ish META: version? also possibly JS if I have time ._.. Part 1: Selection You are tasked with randomly pressing the keys A and ...

I have a number like this: n = 548915381 The output should be the sum of every second number. In this case 26: 4+9+5+8 = 26 Rules: This is a code-golf, so the shortest code in bytes wins. The input consists only of numbers bigger than 10 (at least 2 digits) but smaller than an int32. The input...

Write a Python code to check the given number is harryporter’s code or not. (HarryPorter’s Number means – “The sum of the power of the cube of the digit is equal to that of the number”). Also write pseudocode explaining the logic of the program.

Friend or Foe? Task Provide two programs A and B (not necessarily in the same language) with the following properties: Either program, when given its own source code as input, produces an accepting output. Either program, when given the other program's source code as input, produces a rejecting ...

Halting detector Choose a Turing complete language and write a program in this language that, given a program in 1TB, decide whether it halts. Your program would likely be more than 1TB, which results in transferring difficulty1. Therefore, you only need to show your construction and prove your c...