diff -r dea46bdfd648 -r 21b52310bd8b testing1/collatz.scala
--- a/testing1/collatz.scala	Tue Nov 05 00:41:02 2019 +0000
+++ b/testing1/collatz.scala	Wed Nov 06 00:36:45 2019 +0000
@@ -7,11 +7,12 @@
 object CW6a { 
 
 
-def collatz(n: Long): Long =
+/*
+ * def collatz(n: Long): Long =
   if (n == 1) 0 else
     if (n % 2 == 0) 1 + collatz(n / 2) else 
       1 + collatz(3 * n + 1)
-
+*/
 
 def collatz_max(bnd: Long): (Long, Long) = {
   val all = for (i <- (1L to bnd)) yield (collatz(i), i)
@@ -30,6 +31,20 @@
 */
 
 
+
+
+def collatz(n: Long) : Long = {
+    if (n == 1) {
+        1L
+    } else {
+        if (n % 2 == 0) {
+            collatz(n/2) + 1
+        } else {
+            collatz((n*3)+1) + 1
+        }
+    }
+}
+
 }