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|
maze = File.readlines("day13")
xmaze = <<'EOF'.lines.to_a
/->-\
| | /----\
| /-+--+-\ |
| | | | v |
\-+-/ \-+--/
\------/
EOF
cars = []
maze.each_with_index { |row, i|
row.chars.each_with_index { |col, j|
case col
when "^"; cars << [i,j,:n,:l]; row[j] = "|"
when ">"; cars << [i,j,:e,:l]; row[j] = "-"
when "v"; cars << [i,j,:s,:l]; row[j] = "|"
when "<"; cars << [i,j,:w,:l]; row[j] = "-"
end
}
}
cars = [
[65, 26, :s, :r],
[105, 39, :n, :l],
[140, 85, :e, :r]
]
puts maze
crashed = []
loop {
cars.sort! #_by! { |(i,j,d,s)| [j,i] }
p cars.size
p cars
m = maze.map {|l|l.dup}
cars.each { |(i,j,d,s)|
m[i][j] = case d
when :e; ">"
when :n; "^"
when :s; "v"
when :w; "<"
end
}
# puts m
if cars.size == 1
p cars
break
end
cars.each_with_index { |(i,j,d,s),n|
p [maze[i][j],d]
case [maze[i][j],d]
when ["-", :e]
cars[n][1] += 1
when ["-", :w]
cars[n][1] -= 1
when ["|", :s]
cars[n][0] += 1
when ["|", :n]
cars[n][0] -= 1
when ["+", :s]
case s
when :l; cars[n][1] +=1; cars[n][2] = :e; cars[n][3] = :s
when :s; cars[n][0] +=1; cars[n][3] = :r
when :r; cars[n][1] -=1; cars[n][2] = :w; cars[n][3] = :l
end
when ["+", :n]
case s
when :l; cars[n][1] -=1; cars[n][2] = :w; cars[n][3] = :s
when :s; cars[n][0] -=1; cars[n][3] = :r
when :r; cars[n][1] +=1; cars[n][2] = :e; cars[n][3] = :l
end
when ["+", :e]
case s
when :l; cars[n][0] -=1; cars[n][2] = :n; cars[n][3] = :s
when :s; cars[n][1] +=1; cars[n][3] = :r
when :r; cars[n][0] +=1; cars[n][2] = :s; cars[n][3] = :l
end
when ["+", :w]
case s
when :l; cars[n][0] +=1; cars[n][2] = :s; cars[n][3] = :s
when :s; cars[n][1] -=1; cars[n][3] = :r
when :r; cars[n][0] -=1; cars[n][2] = :n; cars[n][3] = :l
end
when ["\\", :e]
cars[n][2] = :s
cars[n][0] += 1
when ["/", :e]
cars[n][2] = :n
cars[n][0] -= 1
when ["\\", :n]
cars[n][2] = :w
cars[n][1] -= 1
when ["/", :n]
cars[n][2] = :e
cars[n][1] += 1
when ["\\", :s]
cars[n][2] = :e
cars[n][1] += 1
when ["/", :s]
cars[n][2] = :w
cars[n][1] -= 1
when ["/", :w]
cars[n][2] = :s
cars[n][0] += 1
when ["\\", :w]
cars[n][2] = :n
cars[n][0] -= 1
else
p [:miss, maze[i][j], d]
end
if cars.each.with_index.any? { |(i2,j2,_,_,m)| i == i2 && j == j2 && n != m }
if crashed.empty?
p [:crash, j, i]
end
crashed << true
cars.delete_at n
cars.delete_if { |(i2,j2,_,_,m)| i == i2 && j == j2 }
end
}
}
p cars
# 32,8 ok
# 38,38
|