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46 lines
821 B
46 lines
821 B
# p ARGF.read.chomp.lines.map(&:chomp)
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INPUT = 7400
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FuelCell = Struct.new(*%i[ x y ]) do
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def rack_id
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x + 10
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end
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def power_level
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power_level = rack_id * y
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power_level += INPUT
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power_level *= rack_id
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power_level = power_level / 100 % 10
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power_level -= 5
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power_level
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end
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end
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grid = Hash.new(0)
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(1..300).each {|x|
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(1..300).each {|y|
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grid[[x,y]] = FuelCell.new(x, y).power_level
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}
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}
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(44..48).each do |y|
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(32..36).each do |x|
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print " #{grid[[x,y]]} "
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end
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puts
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end
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squares = Hash.new(0)
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(2..299).each {|x|
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(2..299).each {|y|
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power_level = [[-1, -1], [0, -1], [1, -1],
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[-1, 0], [0, 0], [1, 0],
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[-1, 1], [0, 1], [1, 1]].map {|(dx,dy)| grid[[x+dx, y+dy]] }.sum
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squares[[x,y]] = power_level
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}
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}
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p squares.max_by(&:last)
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