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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/Partition-function-P/Sidef/partition-function-p-1.sidef Normal file
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say partitions(6666) # very fast

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Task/Partition-function-P/Sidef/partition-function-p-2.sidef Normal file
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func partitionsP(n) {
func (n) is cached {
n <= 1 && return n
var a = sum(1..floor((sqrt(24*n + 1) + 1)/6), {|k|
(-1)**(k-1) * __FUNC__(n - ((k*(3*k - 1)) >> 1))
})
var b = sum(1..ceil((sqrt(24*n + 1) - 7)/6), {|k|
(-1)**(k-1) * __FUNC__(n - ((k*(3*k + 1)) >> 1))
})
a + b
}(n+1)
}
var t = Time.micro
say partitionsP.map(0..25).join(' ')
say partitionsP(6666)
say ("Took %.4f seconds" % Time.micro-t)