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By: a guest on Apr 28th, 2012  |  syntax: Ruby  |  size: 0.21 KB  |  hits: 22  |  expires: Never
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  1. $stdin, $stdout = open('input.txt'), open('output.txt', 'w')
  2. ans = 0
  3. readline.scan(/:-\)+|:-\(+/).each do |key| ans += (key.length - 2)*Hash[")", 1, "(", -1][key[2]] end
  4. print ':-', ans==0 ? '?' : ans>0 ? ')' : '('
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