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Introduction
The four basic math operators (+, -, *, /) can be reduced to just two, due to the fact that:
x + y = x - (-y)
x * y = x / (1/y)
Challenge
The challenge is to take input as a "string" containing:
Numbers
Single character variables ("x", "y")
The four basic math operators (+, -,...
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An abelian sandpile, for our purposes, is an infinite grid with integer coordinates, initially empty of sand. After each second, a grain of sand is placed at (0,0). Whenever a grid cell has 4 or more grains of sand, it spills one grain of sand to each of its four neighbors simultaneously. The nei...
