Path: ...!3.eu.feeder.erje.net!2.eu.feeder.erje.net!feeder.erje.net!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail
From: vallor <vallor@cultnix.org>
Newsgroups: comp.os.linux.advocacy
Subject: Re: C Non-Programming Non-Challenge
Date: 17 Jun 2024 00:04:56 GMT
Lines: 42
Message-ID: <ld9ct8F8s0rU5@mid.individual.net>
References: <17d933d9ffc8ee40$16989$3694546$802601b3@news.usenetexpress.com>
	<17d943beaefb3aa2$16097$2041738$802601b3@news.usenetexpress.com>
	<rPadnWt9mtOO9PP7nZ2dnZfqn_qdnZ2d@supernews.com>
	<ld7lfuF433iU2@mid.individual.net>
	<666f2f33$0$3102233$882e4bbb@reader.netnews.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
X-Trace: individual.net ay8uYj5Hlvb1e2Bru61g+Q7IjRA6aC+jd+Wwb3FJGK+INb+8/j
Cancel-Lock: sha1:W4hGs4MJYsmVGczdXCEuoI+24Dk= sha256:coYEyTvzSk7qGL82HLaoZ5Om3Dk/0F/z5AQX7Cr/GBY=
X-Face: +McU)#<-H?9lTb(Th!zR`EpVrp<0)1p5CmPu.kOscy8LRp_\u`:tW;dxPo./(fCl
 CaKku`)]}.V/"6rISCIDP`
User-Agent: Pan/0.159 (Vovchansk; 764d7cd; Linux-6.9.4)
Bytes: 2252

> On 6/16/2024 4:19 AM, vallor wrote:
>>> On Jun 15, 2024 at 3:20:19 PM EDT, "Farley Flud" <ff@linux.rocks>
>>> wrote:
>>>
>>>> On Sat, 15 Jun 2024 14:29:04 +0000, Farley Flud wrote:
>>>>
>>>>
>>>>> Write a C program to compute the subfactorial of an integer N.
>>>>>
>>>>>
>>>> Nobody got it (as predicted).
>>>
>>> Because no one bothered.
>> 
>> I actually took the opportunity to install the GMP documentation on my
>> system, look up what a "subfactorial" is, and do an implementation that
>> works for !N where N is 0 through 50.
> 
> Where's your code?

https://github.com/vallor/subfactorial/

$ ./try_mpz 
0:1
1:0
2:1
3:2
4:9
5:44
6:265
7:1,854
[...]
48:4,566,824,330,931,624,695,767,452,273,778,667,071,025,042,534,230,906,772,538,913
49:223,774,392,215,649,610,092,605,161,415,154,686,480,227,084,177,314,431,854,406,736
50:11,188,719,610,782,480,504,630,258,070,757,734,324,011,354,208,865,721,592,720,336,801

(I wrote a function to format the numbers.)

-- 
-v System76 Thelio Mega v1.1 x86_64 NVIDIA RTX 3090 Ti
   OS: Linux 6.9.4 Release: Mint 21.3 Mem: 258G
   "I don't eat snails... I prefer FAST food!"