9 lines
214 B
Ruby
9 lines
214 B
Ruby
n = 20
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# select Pythagorean triplets
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r = ((1..n).flat_map { |x|
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(x..n).flat_map { |y|
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(y..n).flat_map { |z|
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[[x, y, z]].keep_if { x * x + y * y == z * z }}}})
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p r # print the array _r_
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