restore *.orig.c to each entry

Under each yyyy/dir there is a file of the form '*.orig.c'
containing the original source code, or as close as we can
get to the original source code.

2001/cheong/cheong.orig.c

@@ -0,0 +1,12 @@
+#include <stdio.h>
+int l;int main(int o,char **O,
+int I){char c,*D=O[1];if(o>0){
+for(l=0;D[l              ];D[l
+++]-=10){D   [l++]-=120;D[l]-=
+110;while   (!main(0,O,l))D[l]
++=   20;   putchar((D[l]+1032)
+/20   )   ;}putchar(10);}else{
+c=o+     (D[I]+82)%10-(I>l/2)*
+(D[I-l+I]+72)/10-9;D[I]+=I<0?0
+:!(o=main(c/10,O,I-1))*((c+999
+)%10-(D[I]+92)%10);}return o;}