2017年11月15日
Leetcode 98: Validate Binary Search Tree
摘要： Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: The left subtree of a node contains only 阅读全文
posted @ 2017-11-15 03:06 逸朵 阅读(184) 评论(0) 推荐(0)
Leetcode 96: Unique Binary Search Trees
摘要： Given n, how many structurally unique BST's (binary search trees) that store values 1...n? For example,Given n = 3, there are a total of 5 unique BST' 阅读全文
posted @ 2017-11-15 01:46 逸朵 阅读(135) 评论(0) 推荐(0)
Leetcode 94: Binary Tree Inorder Traversal
摘要： Given a binary tree, return the inorder traversal of its nodes' values. For example:Given binary tree [1,null,2,3], return [1,3,2]. 阅读全文
posted @ 2017-11-15 01:29 逸朵 阅读(138) 评论(0) 推荐(0)
2017年11月13日
Leetcode 639: Decode Ways II
摘要： A message containing letters from A-Z is being encoded to numbers using the following mapping way: 'A' -> 1 'B' -> 2 ... 'Z' -> 26 Beyond that, now th 阅读全文
posted @ 2017-11-13 12:46 逸朵 阅读(429) 评论(0) 推荐(0)
Leetcode 91: Decode Ways
摘要： A message containing letters from A-Z is being encoded to numbers using the following mapping: Given an encoded message containing digits, determine t 阅读全文
posted @ 2017-11-13 11:55 逸朵 阅读(195) 评论(0) 推荐(0)
Leetcode 90: Subsets II
摘要： Given a collection of integers that might contain duplicates, nums, return all possible subsets (the power set). Note: The solution set must not conta 阅读全文
posted @ 2017-11-13 11:42 逸朵 阅读(123) 评论(0) 推荐(0)
Leetcode 86: Partition List
摘要： Given a linked list and a value x, partition it such that all nodes less than x come before nodes greater than or equal to x. You should preserve the 阅读全文
posted @ 2017-11-13 10:19 逸朵 阅读(121) 评论(0) 推荐(0)
Leetcode 84: Largest Rectangle in Histogram
摘要： Given n non-negative integers representing the histogram's bar height where the width of each bar is 1, find the area of largest rectangle in the hist 阅读全文
posted @ 2017-11-13 07:02 逸朵 阅读(127) 评论(0) 推荐(0)
Leetcode 82: Remove Duplicates from Sorted List II
摘要： Given a sorted linked list, delete all nodes that have duplicate numbers, leaving only distinct numbers from the original list. For example,Given 1->2 阅读全文
posted @ 2017-11-13 06:00 逸朵 阅读(93) 评论(0) 推荐(0)
Leetcode 83: Remove Duplicates from Sorted List
摘要： Given a sorted linked list, delete all duplicates such that each element appear only once. For example,Given 1->1->2, return 1->2.Given 1->1->2->3->3, 阅读全文
posted @ 2017-11-13 05:36 逸朵 阅读(121) 评论(0) 推荐(0)