diff -r db2a3e3287a9 -r d67c5f7177a6 progs/lecture4.scala
--- a/progs/lecture4.scala	Fri Nov 25 00:03:15 2022 +0000
+++ b/progs/lecture4.scala	Fri Dec 02 07:48:03 2022 +0000
@@ -7,11 +7,10 @@
 
 import scala.annotation.tailrec
 
-@tailrec 
 def fact(n: BigInt): BigInt = 
   if (n == 0) 1 else n * fact(n - 1)
       
-@tailrec      
+ 
 def factT(n: BigInt, acc: BigInt): BigInt =
   if (n == 0) acc else factT(n - 1, n * acc)
 
@@ -22,7 +21,6 @@
 def foo[A](args: List[A]) = ???
 
 foo(List("1","2","3","4"))
-import scala.annotation.tailrec
 
 
 // from knight1.scala