Merge pull request #12 from xexyl/1993

Get most 1993 entries to compile

1993/vanb/README.md

@@ -31,6 +31,11 @@ Judges' comments:
     It is a good thing that this program consists of only one
     expression, otherwise it might become hard to understand.  :-)
 
+    NOTE: we could not compile this entry under modern macOS but it will work
+    fine under linux. It likely fails to compile under macOS because its gcc is
+    actually just clang which is more strict about the type of the third
+    argument of main(). If you have gcc under macOS it might work just as well.
+    We did not test other systems.
 
 Selected notes from the author:
 

1993/vanb/vanb.c

@@ -1,3 +1,4 @@
+#include <stdio.h>
 O5(O2,O7,O3)char**O7;{return!(O2+=~01+01)?00:!(O2-=02>01)?printf("\045\157\012"
 ,O5(012,O7+01,00)):!(O2-=02>>01)?(**O7<=067&&**O7>057?O5(03,O7,*(*O7)++-060+010
    *O3):O3                     ):!(O2      -=-O3-      ~O3)?       (072>**