Jump to content

Partition function P: Difference between revisions

Partition function P (view source)

Revision as of 16:46, 31 May 2021

9,156 bytes added ,  3 years ago
m
→‎{{header|Phix}}: added syntax colouring the hard way
m (→‎{{header|Phix}}: added syntax colouring the hard way)
Line 567:
 
=={{header|Phix}}==
{{libheader|Phix/mpfr}}
Not exactly super-fast, but this sort of stuff is not really what Phix does best.
<!--<lang Phix>function partDiffDiff(integer nphixonline)-->
<span style="color: #008080;">function</span> <span style="color: #000000;">partDiffDiff</span><span style="color: #0000FF;">(</span><span style="color: #004080;">integer</span> <span style="color: #000000;">n</span><span style="color: #0000FF;">)</span>
return (n+1)/(1+and_bits(n,1))
<span style="color: #008080;">return</span> <span style="color: #0000FF;">(</span><span style="color: #000000;">n</span><span style="color: #0000FF;">+</span><span style="color: #000000;">1</span><span style="color: #0000FF;">)/(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">+</span><span style="color: #7060A8;">and_bits</span><span style="color: #0000FF;">(</span><span style="color: #000000;">n</span><span style="color: #0000FF;">,</span><span style="color: #000000;">1</span><span style="color: #0000FF;">))</span>
end function
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
sequence pd = {1}
<span style="color: #004080;">sequence</span> <span style="color: #000000;">pd</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #000000;">1</span><span style="color: #0000FF;">}</span>
function partDiff(integer n)
<span style="color: #008080;">function</span> <span style="color: #000000;">partDiff</span><span style="color: #0000FF;">(</span><span style="color: #004080;">integer</span> <span style="color: #000000;">n</span><span style="color: #0000FF;">)</span>
while n>length(pd) do
<span style="color: #008080;">while</span> <span style="color: #000000;">n</span><span style="color: #0000FF;">></span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">pd</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span>
pd &= pd[$] + partDiffDiff(length(pd))
<span style="color: #000000;">pd</span> <span style="color: #0000FF;">&=</span> <span style="color: #000000;">pd</span><span style="color: #0000FF;">[$]</span> <span style="color: #0000FF;">+</span> <span style="color: #000000;">partDiffDiff</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">pd</span><span style="color: #0000FF;">))</span>
end while
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
return pd[max(1,n)]
<span style="color: #008080;">return</span> <span style="color: #000000;">pd</span><span style="color: #0000FF;">[</span><span style="color: #7060A8;">max</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #000000;">n</span><span style="color: #0000FF;">)]</span>
end function
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
 
include mpfr.e
<span style="color: #008080;">include</span> <span style="color: #7060A8;">mpfr</span><span style="color: #0000FF;">.</span><span style="color: #000000;">e</span>
sequence pn = {mpz_init(1)}
<span style="color: #004080;">sequence</span> <span style="color: #000000;">pn</span> <span style="color: #0000FF;">=</span> <span style="color: #0000FF;">{</span><span style="color: #7060A8;">mpz_init</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">)}</span>
function partitionsP(integer n)
<span style="color: #008080;">function</span> <span style="color: #000000;">partitionsP</span><span style="color: #0000FF;">(</span><span style="color: #004080;">integer</span> <span style="color: #000000;">n</span><span style="color: #0000FF;">)</span>
mpz res = mpz_init(1)
<span style="color: #004080;">mpz</span> <span style="color: #000000;">res</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">mpz_init</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">)</span>
while n>length(pn) do
<span style="color: #008080;">while</span> <span style="color: #000000;">n</span><span style="color: #0000FF;">></span><span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">pn</span><span style="color: #0000FF;">)</span> <span style="color: #008080;">do</span>
integer nn = length(pn)+1
<span style="color: #004080;">integer</span> <span style="color: #000000;">nn</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">length</span><span style="color: #0000FF;">(</span><span style="color: #000000;">pn</span><span style="color: #0000FF;">)+</span><span style="color: #000000;">1</span>
mpz psum = mpz_init(0)
<span style="color: #004080;">mpz</span> <span style="color: #000000;">psum</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">mpz_init</span><span style="color: #0000FF;">(</span><span style="color: #000000;">0</span><span style="color: #0000FF;">)</span>
for i=1 to nn do
<span style="color: #008080;">for</span> <span style="color: #000000;">i</span><span style="color: #0000FF;">=</span><span style="color: #000000;">1</span> <span style="color: #008080;">to</span> <span style="color: #000000;">nn</span> <span style="color: #008080;">do</span>
integer pd = partDiff(i)
<span style="color: #004080;">integer</span> <span style="color: #000000;">pd</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">partDiff</span><span style="color: #0000FF;">(</span><span style="color: #000000;">i</span><span style="color: #0000FF;">)</span>
if pd>nn then exit end if
<span style="color: #008080;">if</span> <span style="color: #000000;">pd</span><span style="color: #0000FF;">></span><span style="color: #000000;">nn</span> <span style="color: #008080;">then</span> <span style="color: #008080;">exit</span> <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
integer sgn = iff(remainder(i-1,4)<2 ? 1 : -1)
<span style="color: #004080;">integer</span> <span style="color: #000000;">sgn</span> <span style="color: #0000FF;">=</span> <span style="color: #008080;">iff</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">remainder</span><span style="color: #0000FF;">(</span><span style="color: #000000;">i</span><span style="color: #0000FF;">-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #000000;">4</span><span style="color: #0000FF;">)<</span><span style="color: #000000;">2</span> <span style="color: #0000FF;">?</span> <span style="color: #000000;">1</span> <span style="color: #0000FF;">:</span> <span style="color: #0000FF;">-</span><span style="color: #000000;">1</span><span style="color: #0000FF;">)</span>
mpz pnmpd = pn[max(1,nn-pd)]
<span style="color: #004080;">mpz</span> <span style="color: #000000;">pnmpd</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">pn</span><span style="color: #0000FF;">[</span><span style="color: #7060A8;">max</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #000000;">nn</span><span style="color: #0000FF;">-</span><span style="color: #000000;">pd</span><span style="color: #0000FF;">)]</span>
if sgn=-1 then
<span style="color: #008080;">if</span> <span style="color: #000000;">sgn</span><span style="color: #0000FF;">=-</span><span style="color: #000000;">1</span> <span style="color: #008080;">then</span>
mpz_sub(psum,psum,pnmpd)
<span style="color: #7060A8;">mpz_sub</span><span style="color: #0000FF;">(</span><span style="color: #000000;">psum</span><span style="color: #0000FF;">,</span><span style="color: #000000;">psum</span><span style="color: #0000FF;">,</span><span style="color: #000000;">pnmpd</span><span style="color: #0000FF;">)</span>
else
<span style="color: mpz_add(psum,psum,pnmpd)#008080;">else</span>
<span style="color: #7060A8;">mpz_add</span><span style="color: #0000FF;">(</span><span style="color: #000000;">psum</span><span style="color: #0000FF;">,</span><span style="color: #000000;">psum</span><span style="color: #0000FF;">,</span><span style="color: #000000;">pnmpd</span><span style="color: #0000FF;">)</span>
end if
<span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
end for
<span style="color: #008080;">end</span> <span style="color: #008080;">for</span>
pn = append(pn,psum)
<span style="color: #000000;">pn</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">append</span><span style="color: #0000FF;">(</span><span style="color: #000000;">pn</span><span style="color: #0000FF;">,</span><span style="color: #000000;">psum</span><span style="color: #0000FF;">)</span>
end while
<span style="color: #008080;">end</span> <span style="color: #008080;">while</span>
return pn[max(1,n)]
<span style="color: #008080;">return</span> <span style="color: #000000;">pn</span><span style="color: #0000FF;">[</span><span style="color: #7060A8;">max</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #000000;">n</span><span style="color: #0000FF;">)]</span>
end function
<span style="color: #008080;">end</span> <span style="color: #008080;">function</span>
atom t0 = time()
<span style="color: #004080;">atom</span> <span style="color: #000000;">t0</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">time</span><span style="color: #0000FF;">()</span>
integer n=6666
<span style="color: #004080;">integer</span> <span style="color: #000000;">n</span><span style="color: #0000FF;">=</span><span style="color: #000000;">6666</span>
printf(1,"p(%d) = %s (%s)\n",{n,mpz_get_str(partitionsP(n)),elapsed(time()-t0)})</lang>
<span style="color: #7060A8;">printf</span><span style="color: #0000FF;">(</span><span style="color: #000000;">1</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"p(%d) = %s (%s)\n"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">n</span><span style="color: #0000FF;">,</span><span style="color: #7060A8;">mpz_get_str</span><span style="color: #0000FF;">(</span><span style="color: #000000;">partitionsP</span><span style="color: #0000FF;">(</span><span style="color: #000000;">n</span><span style="color: #0000FF;">)),</span><span style="color: #7060A8;">elapsed</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">time</span><span style="color: #0000FF;">()-</span><span style="color: #000000;">t0</span><span style="color: #0000FF;">)})</span>
<!--</lang>-->
{{out}}
<pre>
p(6666) = 193655306161707661080005073394486091998480950338405932486880600467114423441282418165863 (0.8s)
</pre>
 
 
=={{header|Picat}}==
Petelomax
7,806

edits

Retrieved from "https://rosettacode.org/wiki/Special:MobileDiff/303298"
Cookies help us deliver our services. By using our services, you agree to our use of cookies.
More information