Create 1022.py

Author: chandansgowda

1001-1500/1022.py

@@ -0,0 +1,17 @@
+# 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 sumRootToLeaf(self, root: Optional[TreeNode]) -> int:
+        def dfs(node,path):
+            if not node:
+                return 0
+            path = (path<<1)+node.val
+            if not node.left and not node.right:
+                return path
+            else: 
+                return dfs(node.left, path) + dfs(node.right, path)
+        return dfs(root,0)