j1&j2

Problems/01-Same-Tree/same_tree.py

@@ -0,0 +1,14 @@
+# Definition for a binary tree node.
+# class TreeNode:
+#     def __init__(self, val=0, left=None, right=None):
+#         self.val = val
+#         self.left = left
+#         self.right = right
+class Solution:
+    def isSameTree(self, p, q) -> bool:
+        if not p and not q:
+            return True
+        if p and q and p.val == q.val:
+            return self.isSameTree(p.left,q.left) and self.isSameTree(p.right,q.right)
+        else:
+            return False

Problems/02-Symmetric-Tree/symmetric_tree.py

@@ -0,0 +1,19 @@
+# Definition for a binary tree node.
+# class TreeNode:
+#     def __init__(self, val=0, left=None, right=None):
+#         self.val = val
+#         self.left = left
+#         self.right = right
+class Solution:
+    def isSymmetric(self, root) -> bool:
+        return self.isMirror(root,root)
+
+    def isMirror(self,p1,p2) ->bool:
+        if p1 is None and p2 is None:
+            return True
+        if p1 and p2 and p1.val == p2.val:
+            return self.isMirror(p1.left,p2.right) and self.isMirror(p1.right,p2.left)
+        else:
+            return False
+
+