Created
May 15, 2012 15:04
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golf - n choose p
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# current solution: | |
<>=~/,/;$r=++$_+$`;while($c++-$'){$_=$r/$c*$_-$_}print | |
###################################################### | |
=pod | |
All of my scratch getting to this point: | |
<>=~/,/;$r=++$_+$`;while($c++-$'){$_=$_*$r/$c-$_}print | |
while | |
$_=<>;$c=1;s/(\d+)/$1?$c*=$1-1:''/e while/\d/;print$c; | |
join'*',1..$1,1..$2,1..$2-$1 | |
s!(\d+), (\d+)!(join'*',$1-$2+1..$1).'/'.join'*',1..$2!e | |
y!0-9!/!c | |
s!,!/!; | |
#!perl -p s/(\d+), (\d+)/join'*',$..$1/e;eval; | |
s/(\d+), (\d+)/join'*',1..$1,'/(',1..$2,')',1..$1-$2,')'/ | |
s/(\d+)/join'*',$..$1/e;y/(\d+)/$1/s; | |
<>=~/,/;$r=++$_+$`;while($c++-$'){$_=$r/$c*$_-$_}print | |
<>=~/,/;$r=++$_+$`;while($c++-$'){$_*=($r/$c-1)}print | |
<>=~/,/;$r=$`+1;$_=1;while($c++-$'){$_=$_*$r/$c-$_}print | |
<>=~/,/;$r=++$_+$`;while($c++-$'){$_=$r/$c*$_-$_}print | |
<>=~/,/;$r=++$_+$`;while($c++-$'){$_=$_*($r/$c)-$_}print | |
<>=~/,/;$r=++$_+$`;while($c++-$'){$_=$_*($r/$c)-$_}print | |
<>=~/,/;$r=++$_+$`;while($c++-$'){$_=$_*$r/$c-$_}print | |
<>=~/,/;$r=++$_+$`;while($c++-$'){$_=$_*($r/$c)-$_}print | |
<>=~/,/;@a=map{eval join'*',1..0+$_||1}($`,$',$`-$');print $a[0]/($a[1]*$a[2]) | |
<>=~/,/;sub c{eval join'*',1..0+pop||1}print c($`)/(c($')*c$`-$') | |
#!perl -F, -ap $r=$F[0]+1;$_=1;while($c++!=$F[1]){$_=$_*$r/$c-$_} | |
#!perl -F, -ap ($r,$c)=@F;while($c--){$_=$_*$r/$c-$_} | |
<>=~/,/;$r=$`+1;sub c{$_=pop;$c++==$'?print:c($_*$r/$c-$_)}c$. | |
<>=~/,/;$r=$`+1;$_=1;sub c{$c++==$'?print:$_=$_*$r/$c-$_;c}c | |
<>=~/,/;$r=$`+1;$_=1;while($c++!=$'){$_*=($r/$c-1)}print | |
<>=~/,/;$r=$`+1;$_=1;while($c++!=$'){$_*=($r/$c-1)}print | |
#!perl -p /,/;$r=$`+1;$_*=$r/$c-$_ if$c++==$'; | |
<>=~/,/;sub c{eval join'*',1..0+pop||1}print c($`)/(c($')*c$`-$') | |
<>=~/,/;$r=$`+1;sub c{$_=pop;$c++==$'?print:c($_*$r/$c-$_)}c$. | |
<>=~/,/;sub c{($_,$r,$c)=@_;$c++==$'?print:c($_*$r/$c-$_,$r,$c)}c(1,$`+1,0) | |
<>=~/,/;$r=$`+1;sub c{($_,$c)=@_;$c++==$'?print:c($_*$r/$c-$_,$c)}c(1,0) | |
<>=~/,/;sub c{($v,$r,$c)=@_;$c++==$'?print$v:c($v*($r/$c-1),$r,$c)}c(1,$`+1,0) | |
<>=~/,/;sub c{($v,$r,$c)=@_;$c++==$'?print$v:c($v*$r/$c-$v,$r,$c)}c(1,$`+1,0) | |
#!perl -p /,/;}{ | |
<>=~/, (\d+)/;sub c{$_[0]?$_[0]*c($_[0]-1):1}print c($`)/(c($1)*c($`-$1)) | |
<>=~/,/;do{(my$t=$_)=~s/(\d)/join'*',1..$1||1/eg}; | |
<>=~/,/;s/(\d)/join'*',1..$1||1/eg;print eval | |
<>=~/,/;print map{join'*',1..0+$_||1}($`,$',$`-$') | |
<>=~/,/;$_="$`/($'*".($`-$').")";s/(\d)/join'*',1..$1||1/eg;print eval | |
<>=~/,/;$a=$`-$';print eval "$`/($'*$a)"=~s/(\d)/join'*',1..$1||1/egr | |
<>=~/,/;$c="$`/($'*($`-$'))";$t=~s/(\d)/join'*',1..$1||1/g;print eval$t; | |
<>=~/(\d+)..(\d+)/;sub c{$a*=$_ for(1..$_[0])}print c($1)/(c($2)*c($1-$2)) | |
<>=~/, (\d+)/;sub c{eval join'*',(1..pop)}print c($`)/(c($1)*c($`-$1)) | |
<>=~/,/;sub c{eval join'*',1..0+pop||1}print c($`)/(c($')*c($`-$')) | |
<>=~/,/;sub c{eval join'*',pop..0+pop||1}print(1/c$',1)*c$`,$`-$'+1 | |
<>=~/,/;print map{join'*',1..0+$_||1}($`,$',$`-$') | |
<>=~/,/;sub c{join'*',1..0+pop||1}eval"print c($`)/(c($')*c($`-$'))" | |
<>=~/, (\d+)/;sub c{$_[0]?$_[0]*c$_[0]-1:1}print c($`)/(c($1)*c($`-$1)) | |
c($`)/(c($1)*c($`-$1)) | |
c($`,$1)/c($`-$1,1) | |
sub c{$_[0]?$_[0]*c($_[0]-1):1} | |
sub c{($a,$b)=@_;$a==$b?$a:c($a-1,$b)} | |
sub c{$_[0]?$_[0]*c($_[0]-1):1}print c($`)/(c($1)*c($`-$1)) | |
<>=~/, (\d+)/;$1=~s/(\d+)/$1-1*/ eval | |
# 83 | |
#perl -F, -ape | |
#sub c{$_[0]?$_[0]*c($_[0]-1):1}($n,$k)=@F;$_=c($n)/(c($k)*c($n-$k)) | |
#sub c{$_[0]?$_[0]*c($_[0]-1):1}$_=c($F[0])/(c($F[1])*c($F[0]-$F[1])) | |
#sub c{$_[0]?$_[0]*c($_[0]-1):1}$_=c($1)/(c($2)*c($1-$2)) | |
# 78 | |
#<>=~/(\d+)..(\d+)/;sub c{$_[0]?$_[0]*c($_[0]-1):1}print c($1)/(c($2)*c($1-$2)) | |
=cut |
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Still working on getting this shorter. I'm sure that a pure regex solution is the way to go, I really need to avoid the loss of precision that this solution introduces.