--- a/progs/lecture2.scala	Mon Dec 07 01:25:41 2020 +0000
+++ b/progs/lecture2.scala	Fri Jan 15 02:40:57 2021 +0000
@@ -661,25 +661,3 @@
 jumps(List(2,3,1,1,2,4,2,0,1,1)).minBy(_.length)
 
 
-
-
-
-
-/*
- *               1
- *             / |  \
- *           /   |   \
- *         /     |    \
- *        2      3     8
- *      /  \    / \   / \
- *     4    5  6   7 9  10
- * Preorder: 1,2,4,5,3,6,7,8,9,10
- * InOrder: 4,2,5,1,6,3,7,9,8,10
- * PostOrder: 4,5,2,6,7,3,9,10,8,1
- *
- 
-show inorder, preorder, postorder
-
-
-
-*/