Zumkeller numbers: Difference between revisions
Content deleted Content added
→{{header|Python}}: Added a functionally composed variant, using only standard libraries. |
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if even(m): |
if even(m): |
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half = m // 2 |
half = m // 2 |
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return |
return half in ds or ( |
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all(map(lambda x: half >= x, ds)) and ( |
all(map(lambda x: half >= x, ds)) and ( |
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summable(half)(ds) |
summable(half)(ds) |
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''' |
''' |
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def go(y, ys): |
def go(y, ys): |
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if |
if ys: |
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if y in ys: |
if y in ys: |
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return True |
return True |
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| Line 2,561: | Line 2,561: | ||
return (0 < d and go(d, ys[1:])) or go(y, ys[1:]) |
return (0 < d and go(d, ys[1:])) or go(y, ys[1:]) |
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else: |
else: |
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return |
return False |
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return lambda xs: go(x, xs) |
return lambda xs: go(x, xs) |
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| Line 2,717: | Line 2,717: | ||
# MAIN --- |
# MAIN --- |
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if __name__ == '__main__': |
if __name__ == '__main__': |
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main() |
main()</lang> |
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</lang> |
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{{Out}} |
{{Out}} |
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<pre>First 220 Zumkeller numbers: |
<pre>First 220 Zumkeller numbers: |
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