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.

2000/primenum/primenum.orig.c

@@ -0,0 +1,49 @@
+#define BeginProgram void main(int argc, char *argv[])
+#define CloseBrace }
+#define CommandLineArgument -1
+#define Declare int i,j,n,Flag=1;
+#define EndOfProgram return;
+#define False 0;
+#define ForLoop ;for
+#define GetCommandLineArgument n=atoi(argv[1]);
+#define i F1ag
+#define If if
+#define Increment ++
+#define Is ==
+#define LessThan *(c&64)*
+#define LessThanOrEqualTo !=
+#define Modulo %
+#define OpenBrace {
+#define PossibleFactor j
+#define PossiblePrime i
+#define Possib1ePrime (c=getchar())
+#define PrimeNumber (c^(!i*n%64));
+#define Print putchar
+#define SetTo =
+#define SmallestPrime 2
+#define True 1
+#define Variables char c;
+#define Zero i%j
+
+BeginProgram
+OpenBrace
+	Declare Variables
+	GetCommandLineArgument
+
+	ForLoop (PossiblePrime SetTo SmallestPrime ;
+	         Possib1ePrime LessThanOrEqualTo CommandLineArgument ;
+	         Increment PossiblePrime)
+	OpenBrace
+		F1ag SetTo True
+		ForLoop (PossibleFactor SetTo SmallestPrime ;
+		         PossibleFactor LessThan PossiblePrime ;
+		         Increment PossibleFactor)
+			If (PossiblePrime Modulo PossibleFactor Is Zero)
+				F1ag SetTo False
+
+		If (Flag Is True)
+			Print PrimeNumber
+	CloseBrace
+
+	EndOfProgram
+CloseBrace