|
|
@ -1,24 +1,28 @@
|
|
|
|
state = ARGF.read.split("\n").flat_map.with_index {|line,y|
|
|
|
|
DIMENSIONS = 4
|
|
|
|
line.chars.map.with_index {|c,x| [[0,0,y,x], c == "#"] }
|
|
|
|
state = ARGF.read.strip.split("\n").flat_map.with_index {|line,y|
|
|
|
|
|
|
|
|
line.chars.map.with_index {|c,x|
|
|
|
|
|
|
|
|
[[x,y].fill(0, 2, DIMENSIONS-2), c == "#"]
|
|
|
|
|
|
|
|
}
|
|
|
|
}.to_h
|
|
|
|
}.to_h
|
|
|
|
|
|
|
|
|
|
|
|
NEIGHBORS = (0...3**4).map {|n| n.digits(3) }.map {|n| (0..3).map {|x| n.fetch(x, 0) - 1 }} - [[0,0,0,0]]
|
|
|
|
NEIGHBORS = (0...3**DIMENSIONS)
|
|
|
|
|
|
|
|
.reject {|n| n == 3**DIMENSIONS / 2 }
|
|
|
|
|
|
|
|
.map {|n| n.digits(3) }
|
|
|
|
|
|
|
|
.map {|n| (0...DIMENSIONS).map {|x| n.fetch(x, 0) - 1 }}
|
|
|
|
|
|
|
|
|
|
|
|
def tick(state)
|
|
|
|
def tick(state)
|
|
|
|
actives = state.select {|_,c| c }.keys
|
|
|
|
actives = state.select {|_,c| c }.keys
|
|
|
|
ww, zz, yy, xx = actives.transpose.map(&:minmax).map {|min,max| [min-1, max+1] }
|
|
|
|
minmaxes = actives
|
|
|
|
Range.new(*ww).flat_map {|w|
|
|
|
|
.transpose.map(&:minmax)
|
|
|
|
Range.new(*zz).flat_map {|z|
|
|
|
|
.map {|min,max| (min-1..max+1).to_a }
|
|
|
|
Range.new(*yy).flat_map {|y|
|
|
|
|
coords = minmaxes.inject {|n,x|
|
|
|
|
Range.new(*xx).map {|x|
|
|
|
|
n.flat_map {|nn| x.map {|xx| [nn, xx] }}
|
|
|
|
active_neighbors = NEIGHBORS.map {|dw,dz,dy,dx| state[[w+dw,z+dz,y+dy, x+dx]] }.count(&:itself)
|
|
|
|
}.map(&:flatten)
|
|
|
|
wzyx = [w,z,y,x]
|
|
|
|
coords.map {|coord|
|
|
|
|
[ wzyx,
|
|
|
|
active_neighbors = NEIGHBORS.count {|delta| state[coord.zip(delta).map {|a,b| a + b }] }
|
|
|
|
state[wzyx] ? (2..3).cover?(active_neighbors) : active_neighbors == 3
|
|
|
|
[ coord,
|
|
|
|
]
|
|
|
|
state[coord] ? (2..3).cover?(active_neighbors) : active_neighbors == 3
|
|
|
|
}
|
|
|
|
]
|
|
|
|
}
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
}.to_h
|
|
|
|
}.to_h
|
|
|
|
end
|
|
|
|
end
|
|
|
|
|
|
|
|
|
|
|
|