File: root - text - article - 2019 - 11 - validate-binary-search-tree.txt.txt
Tags: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | English | Home Page | Category: Computing | 213 Views, 16269 Search Bots | 128 Words
| Browse | Archive
Tags: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | English | Home Page | Category: Computing | 213 Views, 16269 Search Bots | 128 Words
| Browse | Archive
Hi, here's your problem today. This problem was recently asked by Facebook:
You are given the root of a binary search tree. Return true if it is a valid binary search tree, and false otherwise. Recall that a binary search tree has the property that all values in the left subtree are less than or equal to the root, and all values in the right subtree are greater than or equal to the root.
Here's a starting point:
Tags: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | English | Home Page | Cateogry: Computing | 213 Views, 16269 Search Bots | 128 Words You are given the root of a binary search tree. Return true if it is a valid binary search tree, and false otherwise. Recall that a binary search tree has the property that all values in the left subtree are less than or equal to the root, and all values in the right subtree are greater than or equal to the root.
Here's a starting point:
class TreeNode:
def __init__(self, key):
self.left = None
self.right = None
self.key = key
def is_bst(root):
# Fill this in.
a = TreeNode(5)
a.left = TreeNode(3)
a.right = TreeNode(7)
a.left.left = TreeNode(1)
a.left.right = TreeNode(4)
a.right.left = TreeNode(6)
print is_bst(a)
# 5
# / \
# 3 7
# / \ /
#1 4 6
Related Articles
- How to Play WAV music under DOS?
- Daily Interview Problem: Min Range Needed to Sort
- Daily Interview Problem: Given two arrays, write a function to compute their intersection.
- Algorithm Interview Question: H-Index
- Daily Interview Problem: 3 Sum
- Daily Interview Problem: Group Words that are Anagrams
- Algorithm Interview: No Adjacent Repeating Characters
- Skip the readings, focus on problems. And use all the hints!
- Daily Interview Problem: Word Ordering in a Different Alphabetical Order
- Windows Scripting
©2006~2024 SteakOverCooked - 0.01542 Seconds(s) - 1323.087 KB/s - 31 Online Memory: 493.77 KB
18:54:01 up 13 days, 18:33, 2 users, load average: 0.98, 0.86, 0.73 - Server PHP Version: 7.4.33
How to Cook a Perfect Steak? | <meta name="robots" content="index, follow">
18:54:01 up 13 days, 18:33, 2 users, load average: 0.98, 0.86, 0.73 - Server PHP Version: 7.4.33
Comments (0)
Read & Write - Normal - Mini - Post - All Comments - Statistics
Be the first one to comment this page !