34 lines
741 B
Ruby
34 lines
741 B
Ruby
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#!/bin/env ruby
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ids = []
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File.readlines('./input').each do |line|
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line.strip!
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row = [0, 127]
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col = [0, 7]
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step = 64
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line[..6].each_char do |char|
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row[0] += step if char == 'B'
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row[1] -= step if char == 'F'
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step /= 2
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end
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step = 4
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line[-3..].each_char do |char|
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col[0] += step if char == 'R'
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col[1] -= step if char == 'L'
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step /= 2
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end
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id = (row[0] * 8) + col[0]
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ids.push(id)
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puts "Seat #{line} is at row #{row} and column #{col}. Seat id: #{id}"
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end
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puts "The highest seat ID is #{ids.max}"
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ids.sort!
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ids.each_index do |i|
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next if i == 0
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if ids[i] != (ids[i-1] + 1)
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puts "My seat is #{ids[i] - 1}"
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break
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end
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end
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