add same tree

Signed-off-by: vsoch <vsoch@users.noreply.github.com>

same-tree/run.py

@@ -0,0 +1,15 @@
+# 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: Optional[TreeNode], q: Optional[TreeNode]) -> bool:
+        # Base cases - either both are None (same)
+        if p is None and q is None:
+            return True
+        # One is None, other not (different)
+        elif p is None or q is None:
+            return False
+        return self.isSameTree(p.left, q.left) and self.isSameTree(p.right, q.right) and p.val == q.val