9 lines
213 B
Text
9 lines
213 B
Text
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def fib(n):
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def aux: if . == 0 then 0
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elif . == 1 then 1
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else (. - 1 | aux) + (. - 2 | aux)
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end;
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if n < 0 then error("negative arguments not allowed")
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else n | aux
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end ;
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