t is None: return res dfs(res, root, str(root.val)) return res def dfs(res, root, cur): if root.left is None and root.right is None: res.append(cur) if root.left:
t is None: return res dfs(res, root, str(root.val)) return res def dfs(res, root, cur): if root.left is None and root.right is None: res.append(cur) if root.left:
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
def binary_tree_paths(root):
res = []
if root is None:
return res
dfs(res, root, str(root.val))
return res
def dfs(res, root, cur):
if root.left is None and root.right is None:
res.append(cur)
if root.left:
dfs(res, root.left, cur+'->'+str(root.left.val))
if root.right:
dfs(res, root.right).
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