Background Adám and I were once discussing a way to properly extend some features in Dyalog APL. I came up with the following extension to Take, a function that takes some front or back elements (and an analogous extension to Drop). We agreed that it was a good idea, but it was incredibly hard to...

The almost impossible chessboard puzzle code-golf puzzle-solver error-correction Background Prisoner 1 walks in, sees a chessboard (8x8) where each square has a coin on top, flipped either to heads or tails. The warden places the key under one of the squares, which prisoner 1 sees. Before prison...

The Fibonacci sequence is a well know sequence in which each entry is the sum of the previous two and the first two entries are 1. If we take the modulo of each term by a constant the sequence will become periodic. For example if we took decided to compute the sequence mod 7 we would get the fo...

In this form of the game Tic-Tac-Chec, the goal is to move chess pieces to get four-in-a-row. Your goal here is to figure out if a position has a winning move. Rules The rules are similar, but not identical, to those of Tic-Tac-Chec. The board is 4 by 4 squares. Each player has a rook, bishop, kn...

Input: from STDIN number of vertices in Graph $2 \leq N \leq 100$. Rules: [Code size] = max ([code length without spaces, tabs and newlines], [total code length divided by 4]) Math formulation: In the graph of N vertices, between each pair of vertices can be 3 road states: there is no road there...

The challenging nature of aggressively optimizing for program size has itself long been recognized https://en.wikipedia.org/wiki/Code_golf In the old days, memory was very limited The larger 360 models could have up to 8 MB of main memory, though main memory that big was unusual—a large instal...

Description Your task is to implement a simple UNIX command parser and file system. Your program will have to implement a file system that can be modified via commands. The starting directory of your file system is an empty root directory /, with no subdirectories or files. Your program must be c...