26 lines
475 B
Ruby
26 lines
475 B
Ruby
# This solution uses three generators.
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def powers(m)
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return enum_for(__method__, m) unless block_given?
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n = 0
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loop { yield n ** m; n += 1 }
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end
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def squares_without_cubes
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return enum_for(__method__) unless block_given?
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cubes = powers(3)
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c = cubes.next
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squares = powers(2)
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loop do
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s = squares.next
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c = cubes.next while c < s
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yield s unless c == s
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end
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end
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answer = squares_without_cubes
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20.times { answer.next }
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p 10.times.map { answer.next }
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