2015年9月23日
*Unique Binary Search Tree
摘要： 题目：Givenn, how many structurally uniqueBST's(binary search trees) that store values 1...n?For example,Givenn= 3, there are a total of 5 unique BST's. ... 阅读全文
posted @ 2015-09-23 12:27 Hygeia 阅读(205) 评论(0) 推荐(0)
*Unique paths II
摘要： 题目：Follow up for "Unique Paths":Now consider if some obstacles are added to the grids. How many unique paths would there be?An obstacle and empty spac... 阅读全文
posted @ 2015-09-23 11:57 Hygeia 阅读(175) 评论(0) 推荐(0)
Unique path
摘要： 题目：A robot is located at the top-left corner of amxngrid (marked 'Start' in the diagram below).The robot can only move either down or right at any poi... 阅读全文
posted @ 2015-09-23 11:26 Hygeia 阅读(240) 评论(0) 推荐(0)
*Jump Game
摘要： Given an array of non-negative integers, you are initially positioned at the first index of the array.Each element in the array represents your maximu... 阅读全文
posted @ 2015-09-23 06:20 Hygeia 阅读(176) 评论(0) 推荐(0)