48 lines
862 B
Crystal
48 lines
862 B
Crystal
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require "advent"
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boxes, instructions = input(2022, 5).split("\n\n")
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boxes = parse_boxes_lines(boxes.lines);
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instrs = parse_instrs(instructions.lines);
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def parse_instr(str)
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_, n, _, f, _, t = str.split(" ")
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{ n.to_i64, f.to_i64, t.to_i64 }
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end
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def parse_instrs(lines)
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lines.map { |l| parse_instr(l) }
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end
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def parse_boxes_line(str)
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str += " "
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str.chars.in_groups_of(4).map do |group|
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group[1]
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end
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end
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def parse_boxes_lines(lines)
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lines.pop
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lines = lines.map { |l| parse_boxes_line(l) }
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lines = lines.transpose
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lines.each do |line|
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line.reject!(&.==(' ')).reverse!
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end
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lines
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end
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def move(from, to, n)
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# n.times do
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# to << from.pop
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# end
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from.pop(n).each do |x|
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next unless x
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to.push(x)
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end
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end
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instrs.each do |instr|
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n, f, t = instr
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move(boxes[f-1], boxes[t-1], n)
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end
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puts boxes.map(&.last).join("")
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