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|
solids = Hash.new { |h, k| h[k] = Array.new }
$stdin.readlines.map { |line|
line.strip.split(' -> ').map {
|coord| coord.split(?,).map(&:to_i)
}
}.each { |path|
(path.length - 1).times { |i|
if path[i][0] == path[i+1][0]
x = path[i][0]
y1 = path[i][1]
y2 = path[i+1][1]
if y1 > y2
t = y2
y2 = y1
y1 = t
end
(y1..y2).each { |y| solids[y] << x }
else
x1 = path[i][0]
x2 = path[i+1][0]
if x1 > x2
t = x2
x2 = x1
x1 = t
end
y = path[i][1]
(x1..x2).each { |x| solids[y] << x }
end
}
}
solids.keys.each { |k| solids[k].uniq! }
floor = solids.keys.flatten.max + 1
sands = 0
loop do
sandx = 500
sandy = 0
loop do
break if sandy == floor
r = solids[sandy + 1]
if r.include?(sandx)
if r.include?(sandx - 1)
if r.include?(sandx + 1)
break
else
sandx += 1
end
else
sandx -= 1
end
end
sandy += 1
end
solids[sandy] << sandx
sands += 1
break if sandx == 500 && sandy == 0
end
puts sands
|
