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akiradeveloper/gist:b995761f7dc54ba006f5

Created May 11, 2015 12:14
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演算子を挟んで合計100になる
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gistfile1.txt
A=["", "+", "-"]
A.product(A, A, A, A, A, A, A).each do |combi|
expr = [1,2,3,4,5,6,7,8,9].zip(combi).flatten.join("")
puts expr if eval(expr) == 100
end
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