chiyeung

[LeetCode&Python] Problem 733. Flood Fill

摘要： An image is represented by a 2-D array of integers, each integer representing the pixel value of the image (from 0 to 65535). Given a coordinate (sr, 阅读全文

posted @ 2018-11-26 18:15 chiyeung 阅读(171) 评论(0) 推荐(0)

[LeetCode&Python] Problem 796. Rotate String

摘要： We are given two strings, A and B. A shift on A consists of taking string A and moving the leftmost character to the rightmost position. For example, 阅读全文

posted @ 2018-11-25 16:20 chiyeung 阅读(97) 评论(0) 推荐(0)

[LeetCode&Python] Problem 530. Minimum Absolute Difference in BST

摘要： Given a binary search tree with non-negative values, find the minimum absolute difference between values of any two nodes. Example: Note: There are at 阅读全文

posted @ 2018-11-25 16:13 chiyeung 阅读(164) 评论(0) 推荐(0)

[LeetCode&Python] Problem 100. Same Tree

摘要： Given two binary trees, write a function to check if they are the same or not. Two binary trees are considered the same if they are structurally ident 阅读全文

posted @ 2018-11-24 15:10 chiyeung 阅读(89) 评论(0) 推荐(0)

[LeetCode&Python] Problem 783. Minimum Distance Between BST Nodes

摘要： Given a Binary Search Tree (BST) with the root node root, return the minimum difference between the values of any two different nodes in the tree. Exa 阅读全文

posted @ 2018-11-24 09:40 chiyeung 阅读(195) 评论(0) 推荐(0)

[LeetCode&Python] Problem 860. Convert BST to Greater Tree

摘要： Given a Binary Search Tree (BST), convert it to a Greater Tree such that every key of the original BST is changed to the original key plus sum of all 阅读全文

posted @ 2018-11-23 11:32 chiyeung 阅读(129) 评论(0) 推荐(0)

[LeetCode&Python] Problem 860. Lemonade Change

摘要： At a lemonade stand, each lemonade costs $5. Customers are standing in a queue to buy from you, and order one at a time (in the order specified by bil 阅读全文

posted @ 2018-11-23 10:45 chiyeung 阅读(150) 评论(0) 推荐(0)

[LeetCode&Python] Problem 217. Contains Duplicate

摘要： Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the arr 阅读全文

posted @ 2018-11-22 10:45 chiyeung 阅读(87) 评论(0) 推荐(0)

[LeetCode&Python] Problem 242. Valid Anagram

摘要： Given two strings s and t , write a function to determine if t is an anagram of s. Example 1: Example 2: Note:You may assume the string contains only 阅读全文

posted @ 2018-11-22 10:41 chiyeung 阅读(108) 评论(0) 推荐(0)

[LeetCode&Python] Problem 427. Construct Quad Tree

摘要： We want to use quad trees to store an N x N boolean grid. Each cell in the grid can only be true or false. The root node represents the whole grid. Fo 阅读全文

posted @ 2018-11-21 11:52 chiyeung 阅读(226) 评论(0) 推荐(0)

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