# 判断两棵二叉树是否同构：即就是判断两棵树的结构是否一样，长得是否一样。
# 判断两棵二叉树是否相同：即就是在同构的基础上再判断两棵树中对应的元素数据是否相同。
# 解决思路：（用类似于递归遍历二叉树的方式）
# 1. 建立二叉树
# 2. 递归判断是否同构
# 3. 在递归的基础上判读元素是否相同
1 # encoding:utf-8
2
3 class Node:
4 def __init__(self, data):
5 self.data = data
6 self.left = None
7 self.right = None
8
9 # ---------------------------------------
10 # 用手工的方式生成二叉树
11 #----------------------------------------
12 n1 = Node(1)
13 n2 = Node(2)
14 n3 = Node(3)
15 n4 = Node(4)
16 n5 = Node(5)
17
18 n1.left = n2
19 n1.right = n3
20 n2.left = n4
21 n2.right = n5
22
23 root1 = n1
24 root2 = n1
25
26 #----------------------------------------
27 #遍历二叉树
28 #----------------------------------------
29 def treversal(root):
30 if root is not None:
31 print root.data,
32 treversal(root.left)
33 treversal(root.right)
34
35 #----------------------------------------
36 #判断两棵二叉树是否同构
37 #----------------------------------------
38 def isIsomorphism(root1, root2):
39 if root1 is None and root2 is None:
40 return 1
41 if root1 and root2:
42 return isIsomorphism(root1.left, root2.left) \
43 and \
44 isIsomorphism(root1.right, root2.right)
45 else:
46 return 0
47
48 #----------------------------------------
49 #判断两棵二叉树是否相同
50 #----------------------------------------
51 def isSame(root1, root2):
52 if root1 is None and root2 is None:
53 return 1
54 if root1 and root2 and root1.data == root2.data:
55 return isSame(root1.left, root2.left) and \
56 isSame(root1.right, root2.right)
57 else:
58 return 0
59
60 treversal(n1)
61
62 print ''
63
64 if isIsomorphism(root1, root2.left):
65 print 'ISomorphism'
66 else:
67 print 'Not Isomorphism'
68
69 if isSame(root1, root2.left):
70 print 'Same'
71 else:
72 print 'Not Same'