Task Given the pre-order and post-order traversals of a full binary tree, return its in-order traversal. The traversals will be represented as two lists, both containing n distinct positive integers, each uniquely identifying a node. Your program may take these lists, and output the resulting i...

You should write a program or function which receives a string describing the floor as input and outputs or returns the area of the simplest meta-tiling which could create the given pattern of the floor. The floor is a part of a square grid. Every square tile is colored either azure or black (re...

Inspired by this challenge, I got the idea of this one. Challenge A set of vertical columns is provided as a multiline non-emtpy string. Each column have some glass-walls \$(w)\$ = and may have some coins \$(c)\$ $. You have to determine which column will give you the maximum efficiency \$(\eta)\...

You probably know the game mastermind: The player tries to guess a code of 4 slots, with 8 possible colors - no duplicates this time. Let's call those colors A through H, so possible solutions could be ABCD or BCHD. Each time he places a guess, the game master will respond with two information: h...

Write a function or program that accepts two integers as an input (a,b) that defines a range, and outputs the number prime numbers in that range. Examples: input: a=1,b=10 output: 4 (the primes are 2,3,5,7) input: a=2, b=7 output: 4 (the primes are 2,3,5,7)

Challenges tagged as decision-problem involve "deciding whether the input meets certain criteria". Although some challenges with this tag involve more than two categories, most involve only two categories, which seems to be the main purpose of the tag. This meta question refers to two-category de...

Let's suppose the laws of physics are different, and transistors have three states instead of two. This would allow us to use a ternary system instead of the usual binary, which means that in eight bits, we would have 38 = 6561 possible values instead of 28 = 256 possible values. Of course, we're...

Write a program that reads 2 integers and draws a rectangle of corresponding dimensions. modify the program such that in all casses the rectangle is always in horizontal position. meaning when the integers are switched the rectangle remains the same.

Golf a Golfing Language (stub) Design and golf an interpreter of a language that solves several common programming challenges in as few bytes as possible Score = <size of interpreter, in bytes> * <number of unique instructions> * <sum of size of all programs, in bytes> language-design code-golf

Create a program that can be run in 4 different languages such that: One language prints "Hello World!" One language outputs its own source code One language outputs 99 bottles of beer on the wall, that is: 99 bottles of beer on the wall 99 bottles of beer Take one down, pass it around 98 bottle...