chongo@nsc.UUCP (Landon Noll) (06/23/86)
1986 International Obfuscated C Code Contest Winners
We recommend that you first try to understand the program from just reading
the source. If you are still confused try sending the source through the C
Preprocessor (/lib/cpp). If you are still confused, we suggest you read the
judges comments and run each program. Last, if you are still confused then
you are not alone!
===============================================================================
Best layout:
Eric Marshall
System Development Corporation, a Burroughs Company
P.O. Box 517
Paoli, PA.
19301
sdcrdcf!burdvax!eric {sjuvax,ihnp4,akgua,cadre}!psuvax1!burdvax!eric
-------------------------------------------------------------------------------
extern int
errno
;char
grrr
;main( r,
argv, argc ) int argc ,
r ; char *argv[];{int P( );
#define x int i, j,cc[4];printf(" choo choo\n" ) ;
x ;if (P( ! i ) | cc[ ! j ]
& P(j )>2 ? j : i ){* argv[i++ +!-i]
; for (i= 0;; i++ );
_exit(argv[argc- 2 / cc[1*argc]|-1<<4 ] ) ;printf("%d",P(""));}}
P ( a ) char a ; { a ; while( a > " B "
/* - by E ricM arsh all- */); }
===============================================================================
===============================================================================
Worst abuse of the C preprocessor:
Jim Hague
University of Kent at Canterbury
Canterbury, Kent
UK
..mcvax!ukc!jmh
-------------------------------------------------------------------------------
#define DIT (
#define DAH )
#define __DAH ++
#define DITDAH *
#define DAHDIT for
#define DIT_DAH malloc
#define DAH_DIT gets
#define _DAHDIT char
_DAHDIT _DAH_[]="ETIANMSURWDKGOHVFaLaPJBXCYZQb54a3d2f16g7c8a90l?e'b.s;i,d:"
;main DIT DAH{_DAHDIT
DITDAH _DIT,DITDAH DAH_,DITDAH DIT_,
DITDAH _DIT_,DITDAH DIT_DAH DIT
DAH,DITDAH DAH_DIT DIT DAH;DAHDIT
DIT _DIT=DIT_DAH DIT 81 DAH,DIT_=_DIT
__DAH;_DIT==DAH_DIT DIT _DIT DAH;__DIT
DIT'\n'DAH DAH DAHDIT DIT DAH_=_DIT;DITDAH
DAH_;__DIT DIT DITDAH
_DIT_?_DAH DIT DITDAH DIT_ DAH:'?'DAH,__DIT
DIT' 'DAH,DAH_ __DAH DAH DAHDIT DIT
DITDAH DIT_=2,_DIT_=_DAH_; DITDAH _DIT_&&DIT
DITDAH _DIT_!=DIT DITDAH DAH_>='a'? DITDAH
DAH_&223:DITDAH DAH_ DAH DAH; DIT
DITDAH DIT_ DAH __DAH,_DIT_ __DAH DAH
DITDAH DIT_+= DIT DITDAH _DIT_>='a'? DITDAH _DIT_-'a':0
DAH;}_DAH DIT DIT_ DAH{ __DIT DIT
DIT_>3?_DAH DIT DIT_>>1 DAH:'\0'DAH;return
DIT_&1?'-':'.';}__DIT DIT DIT_ DAH _DAHDIT
DIT_;{DIT void DAH write DIT 1,&DIT_,1 DAH;}
===============================================================================
===============================================================================
Best one liner:
Jan Stein
Chalmers Computer Society
Gothenburg
Sweden
..!mcvax!enea!chalmers!gustaf!cd-jan
[The single line has been split to avoid any problems with E-mailers]
-------------------------------------------------------------------------------
typedef char*z;O;o;_=33303285;main(b,Z)z Z;{b=(b>=0||(main(b+1,Z+1),
*Z=O%(o=(_%25))+'0',O/=o,_/=25))&&(b<1||(O=time(&b)%0250600,
main(~5,*(z*)Z),write(1,*(z*)Z,9)));}
===============================================================================
===============================================================================
Most adaptable program:
Jack Applin
Hewlett-Packard
Ft. Collins
Colorado
USA
ihnp4!hplabs!hpfcdc!jack
-------------------------------------------------------------------------------
cat =13 /*/ >/dev/null 2>&1; echo "Hello, world!"; exit
*
* This program works under cc, f77, and /bin/sh.
*
*/; main() {
write(
cat-~-cat
/*,'(
*/
,"Hello, world!"
,
cat); putchar(~-~-~-cat); } /*
,)')
end
*/
===============================================================================
===============================================================================
Most useful obfuscation:
Walter Bright
<Email address not given>
decwrl!sun!fluke!uw-beaver!entropy!dataio!bright
-------------------------------------------------------------------------------
#include <stdio.h>
#define O1O printf
#define OlO putchar
#define O10 exit
#define Ol0 strlen
#define QLQ fopen
#define OlQ fgetc
#define O1Q abs
#define QO0 for
typedef char lOL;
lOL*QI[] = {"Use:\012\011dump file\012","Unable to open file '\x25s'\012",
"\012"," ",""};
main(I,Il)
lOL*Il[];
{ FILE *L;
unsigned lO;
int Q,OL[' '^'0'],llO = EOF,
O=1,l=0,lll=O+O+O+l,OQ=056;
lOL*llL="%2x ";
(I != 1<<1&&(O1O(QI[0]),O10(1011-1010))),
((L = QLQ(Il[O],"r"))==0&&(O1O(QI[O],Il[O]),O10(O)));
lO = I-(O<<l<<O);
while (L-l,1)
{ QO0(Q = 0L;((Q &~(0x10-O))== l);
OL[Q++] = OlQ(L));
if (OL[0]==llO) break;
O1O("\0454x: ",lO);
if (I == (1<<1))
{ QO0(Q=Ol0(QI[O<<O<<1]);Q<Ol0(QI[0]);
Q++)O1O((OL[Q]!=llO)?llL:QI[lll],OL[Q]);/*"
O10(QI[1O])*/
O1O(QI[lll]);{}
}
QO0 (Q=0L;Q<1<<1<<1<<1<<1;Q+=Q<0100)
{ (OL[Q]!=llO)? /* 0010 10lOQ 000LQL */
((D(OL[Q])==0&&(*(OL+O1Q(Q-l))=OQ)),
OlO(OL[Q])):
OlO(1<<(1<<1<<1)<<1);
}
O1O(QI[01^10^9]);
lO+=Q+0+l;}
}
D(l) { return l>=' '&&l<='\~';
}
===============================================================================
===============================================================================
Best simple task performed in a complex way:
Bruce Holloway
Digital Research, Inc.
Monterey, CA
USA
(ucbvax!hplabs!amdahl!drivax!holloway)
-------------------------------------------------------------------------------
#include "stdio.h"
#define e 3
#define g (e/e)
#define h ((g+e)/2)
#define f (e-g-h)
#define j (e*e-g)
#define k (j-h)
#define l(x) tab2[x]/h
#define m(n,a) ((n&(a))==(a))
long tab1[]={ 989L,5L,26L,0L,88319L,123L,0L,9367L };
int tab2[]={ 4,6,10,14,22,26,34,38,46,58,62,74,82,86 };
main(m1,s) char *s; {
int a,b,c,d,o[k],n=(int)s;
if(m1==1){ char b[2*j+f-g]; main(l(h+e)+h+e,b); printf(b); }
else switch(m1-=h){
case f:
a=(b=(c=(d=g)<<g)<<g)<<g;
return(m(n,a|c)|m(n,b)|m(n,a|d)|m(n,c|d));
case h:
for(a=f;a<j;++a)if(tab1[a]&&!(tab1[a]%((long)l(n))))return(a);
case g:
if(n<h)return(g);
if(n<j){n-=g;c='D';o[f]=h;o[g]=f;}
else{c='\r'-'\b';n-=j-g;o[f]=o[g]=g;}
if((b=n)>=e)for(b=g<<g;b<n;++b)o[b]=o[b-h]+o[b-g]+c;
return(o[b-g]%n+k-h);
default:
if(m1-=e) main(m1-g+e+h,s+g); else *(s+g)=f;
for(*s=a=f;a<e;) *s=(*s<<e)|main(h+a++,(char *)m1);
}
}
===============================================================================
===============================================================================
Best non-simple performed in a complex way:
Lennart Augustsson
Dept. of Comp. Sci.
Chalmers University of Technology,
412 96 Gothenburg
Sweden
augustss@chalmers.{uucp,csnet}
-------------------------------------------------------------------------------
typedef struct n{int a:3,
b:29;struct n*c;}t;t*
f();r(){}m(u)t*u;{t*w,*z;
z=u->c,q(z),u->b=z->b*10,
w=u->c=f(),w->a=1,w->c=z->
c;}t*k;g(u)t*u;{t*z,*v,*p,
*x;z=u->c,q(z),u->b=z->b,v
=z->c,z->a=2,x=z->c=f(),x
->a=3,x->b=2,p=x->c=f(),p
->c=f(),p->c->a=1,p->c->c=
v;}int i;h(u)t*u;{t*z,*v,*
w;int c,e;z=u->c,v=z->c,q(
v),c=u->b,e=v->b,u->b=z->b
,z->a=3,z->b=c+1,e+9>=c&&(
q(z),e=z->b,u->b+=e/c,w=f(
),w->b=e%c,w->c=z->c,u->c=
w);}int(*y[4])()={r,m,g,h};
char *sbrk();main(){t*e,*p,*o;
o=f(),o->c=o,o->b=1,e=f(),
e->a=2,p=e->c=f(),p->b=2,
p->c=o,q(e),e=e->c,(void)write
(1,"2.",2);for(;;e=e->c){q(e),
e->b=write(1,&e->b["0123456789"],
1);}}t*f(){return i||(i=1000,
k=(t*)sbrk(i*sizeof(t))),k+--i;
}q(p)t*p;{(*y[p->a])(p);}
===============================================================================
===============================================================================
Most illegible code:
Michael H. Pawka
Naval Ocean Systems Center
San Diego, Ca
92152
DDN - PAWKA@NOSC-TECR.ARPA
-------------------------------------------------------------------------------
#include "stdio.h"
#define xyxx char
#define xyyxx putchar
#define xyyyxx while
#define xxyyyx int
#define xxxyyx main
#define xyxyxy if
#define xyyxyy '\n'
xyxx *xyx [] = {
"]I^x[I]k\\I^o[IZ~\\IZ~[I^|[I^l[I^j[I^}[I^n[I]m\\I]h",
"]IZx\\IZx[IZk\\IZk[IZo_IZ~\\IZ~[IZ|_IZl_IZj\\IZj]IZ}]IZn_IZm\\IZm_IZh",
"]IZx\\IZx[I^k[I\\o]IZ~\\IZ~\\I]|[IZl_I^j]IZ}]I^n[IZm\\IZm_IZh",
"]IZx\\IZx[IZk\\IZk[IZo_IZ~\\IZ~_IZ|[IZl_IZj\\IZj]IZ}]IZn_IZm\\IZm]IZh",
"]I^x[I]k\\IZo_I^~[I^|[I^l[IZj\\IZj]IZ}]I^n[I]m^IZh",'\0'};/*xyyxyxyxxxyxxxyy*/
xyxx *xyyx; xxyyyx xyyyx,xyyyyx,xyyyyyx=0x59,xyyyyyyx=0x29,/*yxxyxyyyxxyyyxyy*/
xxyx=0x68;xxxyyx(){xyyyyx=0;xyyyxx(xyx[xyyyyx]){xyyx=xyx[xyyyyx++];/*xyyyxxyx*/
xyyyxx(*xyyx){xyyyx= *xyyx++-xyyyyyx;xyyyxx(xyyyx--)xyyxx(*xyyx-xyyyyyyx);/*x*/
xyxyxy(*xyyx==xxyx)xyyxx(xyyxyy);*xyyx++;}}}/*xyxyxyyyyxxyxxxyyyxyyyxyxxyyy*/
===============================================================================
===============================================================================
The grand prize (most well-rounded in confusion):
Larry Wall
System Development Corporation
Santa Monica
California
US of A
{allegra,burdvax,cbosgd,hplabs,ihnp4,sdcsvax}!sdcrdcf!lwall
-------------------------------------------------------------------------------
#define _c(C)_ (C)&('|'+3):c_()(C)>>('\n'-3) __ /**/
#define C char*
#define keyboard ",,B3-u;.(&*5., /(b*(1\036!a%\031m,,,,,\r\n"
#define main(o,oo)oo(o){
#define _ ;case
C
#define c_(cc)c cc=
#define C_(sand)_O(sand)witch
o=keyboard;
#define __ ;break;
C
ccc(
cc)
C
cc;
{
C
cccc=
cc;int
#ifndef lint
#define keyboard "dijs QH.soav Vdtnsaoh DmfpaksoQz;kkt oa, -dijs"
#endif
c;
main(;c_(=(*cc);*cc++)c,for);
#define _O(s)s
main(0xb+(c>>5),C_(s))
_'\v'
:__ _'\f':
main(c,C_(s));
_c(8098)_c(6055)_c(14779)_c(10682)
#define O_(O)_O(O)stem(ccc(
_c(15276)_c(11196)_c(15150)
#define _C ;return
_c(11070)_c(15663)_c(11583)
}
__
default
:c_(+)o[c&__LINE__-007];
main(c_(-)'-'-1,C_(s))_
0214
:_
0216
:c_(+)025 _
0207
:c_(-)4 _
0233
:c_(+)' '-1;
}}c_(&)'z'+5;
}_C cccc;
}main(,cc)
C
#define O write(1,
c="O";
O_(sy) keyboard));
main(;;,for);
read(0,
c,1);*
c_(&)'~'+1
;O ccc(
c),
'\0');
main(*c,
C_(s));_
4
:O_(sy)";kkt -oa, dijszdijs QQ"))_C
_
13
:O o+' ',
3
)
#undef main
__ _ 127:O"\b \b",3)__
default
:O
c,1)
__}}}main(){
cc();
}
===============================================================================
===============================================================================
Judges comments:
Best layout:
Compile and execute and post on your wall.
Worst abuse of the C preprocessor:
Compile and execute. Feed it chars from standard input.
Works with international standard rather than the US standard.
Passes lint.
Best one liner:
Join the 3 lines into one line. Compile and link to the
filename 'a.out'. Execute it the following 2 character
argument: ^M^L (Return/Formfeed). Passes lint.
Most adaptable program:
Compile and/or execute in several ways as documented.
Most useful obfuscation:
Compile and execute. Give a filename as an argument.
Best simple task performed in a complex way:
Compile and execute and understand how it works!
Best non-simple performed in a complex way:
Compile and execute. Works best with an infinite amount of
stack space. (otherwise a 'segmentation violation' eventually
occurs) Do an 'unlimit stacksize' command if your system
allows it. Passes lint.
Most illegible code:
Read, compile and execute.
The grand prize (most well-rounded in confusion):
Compile and execute. Feed it chars from a standard input.
The C compiler documents this program during compliation.
Note the /lib/ccom message and compare it to what the program does!
===============================================================================
We received over twice the number of entries this year, than we did
last year. Judging this year was made more difficult due to the number
of very good entries received. We elected to break down several of the
contest categories rather than exclude some programs.
Thank you to all persons who entered the contest. We hope you will try
again next year.
This years winning programs will be published in the Micro/Systems Journal,
issue date to be announced. They may also wind up in at least one book,
datails to be announced in this newsgroup later.
===============================================================================
The 1987 contest:
Late 1986 entries or early 1987 entries will be entered into next year's
contest and will be subject to the 1987 rules (to be posted April 1987).
Lint passage will likely become more important in 1987. Not as many
programs linted (or compiled) without flaws as in 1985/1984. An award
solely for obfuscation via #defines ("worst abuse of the C pre-processor")
may not be awarded next year unless the program is of paticular merit.
This is intended to try and cut down on the number of programs in this
catagory. To help the judges, we are considering a request that all
entries be sent in under shar format. To help the readers, we will likely
post the 1987 winners under shar format with a makefile. See the upcomming
1987 rules for details.
Send suggestions and/or comments about this contest to ...!decwrl!nsc!obfuscate.
Send comments about net.wobegon to ...!sun!chuq. :-)
===============================================================================
chongo <Landon Curt Noll - decwrl!nsc!chongo> /\oo/\
Larry Bassel <decwrl!nsc!oblio!lab>chongo@nsc.UUCP (Landon Noll) (06/25/86)
The following program: > The grand prize (most well-rounded in confusion): > > Larry Wall > <lines deleted to save space> > > {allegra,burdvax,cbosgd,hplabs,ihnp4,sdcsvax}!sdcrdcf!lwall > ----------------------------------------------------------------------- > #define _c(C)_ (C)&('|'+3):c_()(C)>>('\n'-3) __ /**/ > <lines deleted to save space> does not compile on most System V systems. Several Sys V /lib/ccp's have problems with the first define. The following modification allows it compile: 1c1 < #define _c(C)_ (C)&('|'+3):c_()(C)>>('\n'-3) __ /**/ --- > #define _c(C)_ (C)&('|'+3):c_()(C)>>('\n'-3) __; /**/ Our decisions are final. But we can say: "sorry about that folks!" Next year, we would like to obtain help in running 'nominated' programs in different machines. We will solicit such help near the proper time. chongo <oops, but we still think it is this year's best> /\__/\
chongo@nsc.UUCP (Landon Noll) (06/26/86)
In article <3661@nsc.UUCP> chongo@nsc.UUCP (Landon Noll) writes: >The following program: > >> The grand prize (most well-rounded in confusion): >> <lines deleted to save space> > >does not compile on most System V systems. Several Sys V /lib/ccp's have >problems with the first define. I should have asked: Is this a Sys V bug, or feature? BTW: Some people have problems with the train program. Our BSD snd Sys V.2 compilers give compiler warnings. Your C compiler may flag it as fatal, but it does execute and print a single message on our systems. chongo <> /\oo/\
uddeborg@chalmers.UUCP (G|ran Uddeborg) (06/28/86)
In article <3656@nsc.UUCP> chongo@nsc.UUCP writes: >Worst abuse of the C preprocessor: > > Jim Hague > University of Kent at Canterbury > Canterbury, Kent > UK > > ..mcvax!ukc!jmh >------------------------------------------------------------------------------- >#define DIT ( >#define DAH ) >#define __DAH ++ >#define DITDAH * >#define DAHDIT for >#define DIT_DAH malloc >#define DAH_DIT gets >#define _DAHDIT char >_DAHDIT _DAH_[]="ETIANMSURWDKGOHVFaLaPJBXCYZQb54a3d2f16g7c8a90l?e'b.s;i,d:" There's a bug here. _DAH_[] should be initiated to _DAHDIT _DAH_[]="ETIANMSURWDKGOHVFaLaPJBXCYZQb54a3c2g16g7c8a90l?e'b.s;i,d:" ^ ^ Try input "2", and you'll see the bug. -- "For me, UNIX is a (way of) being." G|ran Uddeborg UUCP: {seismo,mcvax}!enea!chalmers!uddeborg CSnet: uddeborg@chalmers.csnet
jan@myab.UUCP (Jan Stein) (06/28/86)
In article <3656@nsc.UUCP> chongo@nsc.UUCP writes: > Best one liner: > Join the 3 lines into one line. Compile and link to the > filename 'a.out'. Execute it the following 2 character > argument: ^M^L (Return/Formfeed). Passes lint. You get a better result if you compile and link to the filename 'timeinGMT'. Then execute it with: timeinGMT ; echo '' -=- Jan Stein {seismo,okstate,garfield,decvax,philabs}!mcvax!enea!chalmers!myab!jan