Are These Scores Possible? decision-problem
Background
In the sport of Table Tennis (aka Ping-Pong or Whiff Whaff), two opponents play a sequence of rounds, where each round consists of players hitting a ball back and forth until one player (may or may not be the server) gains a point.
Table Tenn...
Recover boolean cells from windowed sums code-golf puzzle-solver minesweeper
Background
In Minesweeper, you will often encounter a horizontal or vertical wall of one's and two's (not yet revealed cells are marked as ?):
... 1 1 1 1 2 2 2 1 2 1 1 ...
... ? ? ? ? ? ? ? ? ? ? ? ...
... A B C D E F G...
Evaluate left-or-right
Left-or-right is a very simple language I made up. Its expression are made of arrows < (left), > (right), and parentheses. The goal is to evaluate an expression to either < or >.
An expression A<B picks the left item A, while picks the right one B. Think of < and > as arrow...
Sandbox
Many of us have seen math problems where a shape made of unit cubes is dipped in paint, and the answer is the number of painted sides. We'll generalize that problem in this challenge.
Input
A 3-dimensional matrix of 0s and 1s.
Output
A non-negative integer
Challenge
Given a n by m by k ma...
