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whatalnk/abc088-b.rb

Created February 19, 2018 01:15
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AtCoder ABC #088 B. Card Game for Two
Raw
abc088-b.rb
n = gets.chomp.to_i
a = gets.chomp.split(" ").map(&:to_i).sort.reverse
ans = 0
n.times do |i|
if (i + 1).odd? then
ans += a[i]
else
ans -= a[i]
end
end
puts ans
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