syf_2016-CSDN博客

Given m arrays, and each array is sorted in ascending order. Now you can pick up two integers from two different arrays (each array picks one) and calculate the distance. We define the distance between

2017-08-30 10:27:08 441

原创 637. Average of Levels in Binary Tree 二叉树每层平均值

Given a non-empty binary tree, return the average value of the nodes on each level in the form of an array. 给定一非空二叉树，返回其每层的平均值所构成的数组。

2017-08-30 10:21:52 268

原创 647. Palindromic Substrings 回文子串

Given a string, your task is to count how many palindromic substrings in this string.The substrings with different start indexes or end indexes are counted as different substrings even they consist

2017-08-30 10:19:14 285

转载 python正则表达式

python正则表达式正则表达式基础1 简单介绍2 数量词的贪婪模式与非贪婪模式3 反斜杠的困扰4 匹配模式re模块1 开始使用re2 Match3 Pattern

2017-08-30 10:11:30 207

转载 30. Substring with Concatenation of All Words

You are given a string, s, and a list of words, words, that are all of the same length. Find all starting indices of substring(s) ins that is a concatenation of each word in words exactly once and

2016-07-20 13:25:32 186

原创 374. Guess Number Higher or Lower猜数大小

We are playing the Guess Game. The game is as follows:I pick a number from 1 to n. You have to guess which number I picked.Every time you guess wrong, I'll tell you whether the number is higher or

2016-07-20 13:23:05 562

原创 367. Valid Perfect Square有效的平方数

Given a positive integer num, write a function which returns True ifnum is a perfect square else False.Note:Do not use any built-in library function such assqrt.Example 1:Input: 16Returns:

2016-07-20 13:21:42 411

原创 300. Longest Increasing Subsequence最长递增子序列

Given an unsorted array of integers, find the length of longest increasing subsequence.For example,Given [10, 9, 2, 5, 3, 7, 101, 18],The longest increasing subsequence is [2, 3, 7, 101], theref

2016-07-20 13:19:58 781

原创 257. Binary Tree Paths 二叉树的路径

Given a binary tree, return all root-to-leaf paths.For example, given the following binary tree: 1 / \2 3 \ 5All root-to-leaf paths are:["1->2->5", "1->3"]给定二叉树，返回其所有根到叶的路径。

2016-07-20 13:18:34 274

原创 357. Count Numbers with Unique Digits统计各位不同的数字个数

Given a non-negative integer n, count all numbers with unique digits, x, where 0 ≤ x n.Example:Given n = 2, return 91. (The answer should be the total numbers in the range of 0 ≤ x < 100, excludin

2016-07-20 13:15:18 591

syf_2016的博客

转载机器学习2 逻辑回归Logistic Regression

转载机器学习1 线性回归 Linear Regression

原创 567. Permutation in String 字符串置换

原创 572. Subtree of Another Tree 子树的判定

原创 606. Construct String from Binary Tree 二叉树的字符串描述

原创 617. Merge Two Binary Trees 二叉树合并

原创 624. Maximum Distance in Arrays 数组最大距离