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20 lines
406 B
20 lines
406 B
list = ARGF.read.lines(chomp: true).map(&:to_i)
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list = list.map { _1 * 811589153 }
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list = list.map.with_index { [_2, _1] }
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10.times do
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(0...list.size).each do |i|
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j = list.index {|ii,_| ii == i }
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_, n = list.delete_at(j)
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j += n
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j %= list.size
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list.insert(j, [i, n])
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end
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end
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list = list.map(&:last)
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i = list.index(0)
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p [1000, 2000, 3000].sum { list.fetch((i + _1) % list.size) }
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