17 lines
221 B
Ruby
17 lines
221 B
Ruby
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#!/usr/bin/ruby
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def sum(last, current, sum)
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if current >= 4000000
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return sum
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end
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if current % 2 == 0
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sum += current
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end
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tmp = current
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current += last
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last = tmp
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sum(last, current, sum)
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end
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puts sum(0, 1, 0)
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