From b61c58b1587d4e4e7bea9f79932d880e97ba42f4 Mon Sep 17 00:00:00 2001
From: bt3gl <138340846+bt3gl-cryptographer@users.noreply.github.com>
Date: Tue, 8 Aug 2023 14:51:08 -0700
Subject: [PATCH] Update and rename bt_construction_inorder_postorder.py to
 bt_construct_inorder_postorder.py

---
 trees/bt_construct_inorder_postorder.py    | 25 +++++++++++++++++++
 trees/bt_construction_inorder_postorder.py | 29 ----------------------
 2 files changed, 25 insertions(+), 29 deletions(-)
 create mode 100644 trees/bt_construct_inorder_postorder.py
 delete mode 100644 trees/bt_construction_inorder_postorder.py

diff --git a/trees/bt_construct_inorder_postorder.py b/trees/bt_construct_inorder_postorder.py
new file mode 100644
index 0000000..697186d
--- /dev/null
+++ b/trees/bt_construct_inorder_postorder.py
@@ -0,0 +1,25 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+# author: bt3gl
+
+
+def build_tree(left, right, index_map):
+            
+        if left > right:
+                return None
+            
+        root = Node(postorder.pop())  # this order change from preorder
+        index_here = index_map[root.val]
+
+        root.right = build_tree(index_here + 1, right, index_map) # this order change from preorder
+        root.left = build_tree(left, index_here - 1, index_map)
+            
+        return root
+
+
+def build_tree(inorder, postorder) -> Optional[Node]:
+
+        index_map = {val: i for i, value in enumerate(inorder)}
+            
+        return fill_tree(0, len(inorder) - 1, index_map)
+    
diff --git a/trees/bt_construction_inorder_postorder.py b/trees/bt_construction_inorder_postorder.py
deleted file mode 100644
index 144779d..0000000
--- a/trees/bt_construction_inorder_postorder.py
+++ /dev/null
@@ -1,29 +0,0 @@
-#!/usr/bin/env python3
-# -*- coding: utf-8 -*-
-# author: bt3gl
-# Given two integer arrays inorder and postorder where inorder is the inorder 
-# traversal of a binary tree and postorder is the postorder traversal of the
-# same tree, construct and return the binary tree.
-
-
-def fill_tree(i_left, i_right, inorder_map):
-            
-        if i_left > i_right:
-                return None
-            
-        val = postorder.pop()
-        root = TreeNode(val)
-
-        index_here = inorder_map[val]
-
-        root.right = fill_tree(index_here + 1, i_right, inorder_map)
-        root.left = fill_tree(i_left, index_here - 1, inorder_map)
-            
-        return root
-
-
-def build_tree(inorder: list[int], postorder: list[int]) -> Optional[TreeNode]:
-
-        inorder_map = {val: index for index, val in enumerate(inorder)}
-        return fill_tree(0, len(inorder) - 1, inorder_map)
-