Introduction Consider a sequence of integers and one of its subsequences, say A = [4 2 2 4 4 6 5] and B = [2 4 5]. We want to remove the elements of B from A in order, and there are several ways of doing that: A = 4 2 2 4 4 6 5 B = 2 4 5 -> 4 2 4 6 A = 4 2 2 4 4 6 5 B = 2 4 ...

Quine Creator Consider a program (or function or code snippet) that accepts a single string argument and returns a string result. Here's an example, which I will call Program 1, of a program that duplicates its input: @echo %* %* We could write a Program 2 that would take the source code of t...

I want to add a loophole about random stuff in CnR challenge to the standard loophole list, but I have a hard time formulating the post in a way that won't result in a lot of "... but what about xyz?", and "zyx is not really random, but it still requires brute forcing". I want to add a loophole ...

All-pairs shortest paths is a standard pathfinding problem. This is a twist on that. Definitions We are searching for paths on a directed graph. Graphs are defined by square matrices, for example 0 3 2.5 1 0 1 0 -1 0 Write M(r,c) = value in M at row r, column c is the cost to travel fro...

The program can be written in any language you wish. Firstly Input/Output should be like this: Input: 2,6 Output: The wires were not connected. Connecting them... Input: 5,6 Output: The wires were not connected. Connecting them... Input: 7,5 Output: The wires w...

Question What is The smallest amount of code that will accept a number and a + or * and return either an addition or multiplication with the dimensions of that number? Specifications The input will be formatted as (dimension, operation). The program should not return anything if the operation ...

Minimal Fresh Substrings We define a "Fresh" substring is a substring that cannot be found earlier in the string. For example, if I take the string "abababc" and split it: ["ab","ab","a","bc"], the first and the last substring are fresh, but the middle two are not, because they can be found ear...

Eating Skittles Like a Normal Person Skittles are colored candy where there are 5 distinct flavors; grape, green apple, lemon, orange, and strawberry represented by (p)urple, (g)reen, (y)ellow, (o)range, and (r)ed respectively. I used to eat skittles by sorting all the different colors, then eat...