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.

2012/tromp/tromp.orig.c

@@ -0,0 +1,27 @@
+     Int L[A],m,b,*D=A,
+      *c,*a=L,C,*U=L,u;s
+       (Int*m){return!*U?
+        *m=g()?U++,!g()?m[
+         1]=s(++U),2:3:1,s(
+          U):g()?U+=2:s(U[1]
+           ++),U-m;}v(){for(D
+            =a;u--;a=*a);C=a[3
+             ];++1[a=a[2]];d(D)
+              ;}char *B,I,O,*S =
+               "-,&,,/.--/,:-,'/"
+               ".-,-,,/.-,*,//..,"
+              ;d(Int*l){--l[1]||d(l
+             [d(*l),*l=B,B=l,2]);}g(
+            ){b=b--?b:m|read(0,&I,1)-
+           1;return~I>>b&1;}x(){for(k(
+          0,6),U[-5]=96;b;*U++=g())k(0,
+         9);}k(l,u){for(;l<=u;U-L-A?*U++
+        =S[l++]^46:exit(5));}main(e){for(
+       k(10,33),a[4]-=m =e-2&7,a[23]=s(U),
+      b=0;;e?e-1?e-2?c   ?D=c,c=*D,*D=a,a=D
+     :exit(L[C+1]):(D     =B?B:calloc(4,X))?
+    B=*D,*D=c,c=D,D[       3]=++C+u, D[2]=a,a
+   [++D[1] ]++:exit         (6):v():C -->22?g(
+  ),1<++b &&x(),k(           7*!b,9),* U++=b&&g
+ ():(C=u+m&1?O=O+             O|C&1,9:write(m||(
+O=C+28),&O,1)+1)               )e=L[C++],u=L[C];}