15 lines
293 B
Ruby
15 lines
293 B
Ruby
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def happy?(n)
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past = []
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until n == 1
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n = n.digits.sum { |d| d * d }
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return false if past.include? n
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past << n
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end
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true
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end
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i = count = 0
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until count == 8; puts i or count += 1 if happy?(i += 1) end
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puts
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(99999999999900..99999999999999).each { |i| puts i if happy?(i) }
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