Miller1991

2016年7月13日

201. Bitwise AND of Numbers Range java solutions

摘要： Given a range [m, n] where 0 <= m <= n <= 2147483647, return the bitwise AND of all numbers in this range, inclusive. For example, given the range [5, 阅读全文

posted @ 2016-07-13 16:17 Miller1991 阅读(120) 评论(0) 推荐(0)

113. Path Sum II java solutions

摘要： Given a binary tree and a sum, find all root-to-leaf paths where each path's sum equals the given sum. For example:Given the below binary tree and sum 阅读全文

posted @ 2016-07-13 14:08 Miller1991 阅读(143) 评论(0) 推荐(0)

306. Additive Number java solutions

摘要： Additive number is a string whose digits can form additive sequence. A valid additive sequence should contain at least three numbers. Except for the f 阅读全文

posted @ 2016-07-13 11:34 Miller1991 阅读(213) 评论(0) 推荐(0)

235. Lowest Common Ancestor of a Binary Search Tree java solutions

摘要： Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST. According to the definition of LCA on Wikipedia 阅读全文

posted @ 2016-07-13 11:01 Miller1991 阅读(159) 评论(0) 推荐(0)

13. Roman to Integer java solutions

摘要： Given a roman numeral, convert it to an integer. Input is guaranteed to be within the range from 1 to 3999. 基本字符 I V X L C D M 相应的阿拉伯数字表示为 1 5 10 50 1 阅读全文

posted @ 2016-07-13 10:29 Miller1991 阅读(156) 评论(0) 推荐(0)

12. Integer to Roman java solutions

摘要： Given an integer, convert it to a roman numeral. Input is guaranteed to be within the range from 1 to 3999. 基本字符 I V X L C D M 相应的阿拉伯数字表示为 1 5 10 50 1 阅读全文

posted @ 2016-07-13 10:16 Miller1991 阅读(161) 评论(0) 推荐(0)

2016年7月12日

Exercise: Linear Regression 斯坦福作业二（转）

摘要：题目给出的数据是一组2-8岁男童的身高。x是年龄，y是身高。样本数m=50. 使用gradient descent来做线性回归。 step1：数据准备。加载数据： >> x=load('ex2x.dat'); >> y=load('ex2y.dat'); 可视化数据：效果如下：我们将模型设定为阅读全文

posted @ 2016-07-12 11:25 Miller1991 阅读(289) 评论(0) 推荐(0)

2016年7月11日

7. Reverse Integer java solutions

摘要： Reverse digits of an integer. Example1: x = 123, return 321Example2: x = -123, return -321 click to show spoilers. Have you thought about this? Here a 阅读全文

posted @ 2016-07-11 10:48 Miller1991 阅读(138) 评论(0) 推荐(0)

125. Valid Palindrome java solutions

摘要： Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. For example,"A man, a plan, a canal: Pan 阅读全文

posted @ 2016-07-11 10:13 Miller1991 阅读(196) 评论(0) 推荐(0)

2016年7月8日

350. Intersection of Two Arrays II java solutions

摘要： Given two arrays, write a function to compute their intersection. Example:Given nums1 = [1, 2, 2, 1], nums2 = [2, 2], return [2, 2]. Note: Each elemen 阅读全文

posted @ 2016-07-08 16:43 Miller1991 阅读(275) 评论(0) 推荐(0)

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