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@ -3,7 +3,6 @@ require "./common.cr"
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lines = File.read("day5_input").split("\n")
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def react(string)
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lower = string.downcase.chars
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string = string.chars
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changed = true
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@ -13,11 +12,9 @@ def react(string)
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while i < string.size - 1
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next_i = i + 1
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if string[i] != string[next_i] &&
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lower[i] == lower[next_i]
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string[i].downcase == string[next_i].downcase
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string.delete_at i
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string.delete_at i
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lower.delete_at i
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lower.delete_at i
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i -= 1
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i = 0 if i < 0
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@ -35,7 +32,7 @@ puts react(lines[0]).size
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pairs = {} of Tuple(Char, Char) => Int32
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('a'..'z').to_a.zip(('A'..'Z').to_a).each do |pair|
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new_string = lines[0].delete(pair[0]).delete(pair[1])
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new_string = lines[0].select { |c| c != pair[0] && c != pair[1] }
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pairs[pair] = react(new_string).size
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end
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