278. First Bad Version 二分法,如果isBadVersion返回true则坏版本在左边,right = mid,否则 left = mid + 1. 注意溢出问题 left+(right - left) /2 最后return left right均可 /* The isBadVersion API is defined in the parent class VersionControl. boolean isBadVersion(int version); */ pub…

Sept. 22, 2015 学一道算法题, 经常回顾一下. 第二次重温, 决定增加一些图片, 帮助自己记忆. 在网上找他人的资料, 不如自己动手. 把从底向上树的算法搞通俗一些. 先做一个例子: 9/22/2015 Go over one example to build some muscle memory about this bottom up, O(1) solution to find the root node in subtree function. Sorted List: 1…

Problem Introduction In this problem, you will implemented the binary search algorithm that allows searching very efficiently(even huge) lists provided that the list is sorted. Problem Description Task.The goal in this code problem is to implement th…

在写binary search时对于mid的计算我最开始使用的是 mid = (low + high)/2; 后来看到在很多的实现为 mid = low + (high - low)/2; 想了一下两种实现貌似没什么差别啊,后来无意看到g9博客上的一篇文章,备份一下: http://blog.csdn.net/g9yuayon/article/details/772382 这是Joshua Bloch(Effective Java的作者)在google blog上发的帖子.在说这个帖子之前,不得…

题目: Given n, generate all structurally unique BST's (binary search trees) that store values 1...n. For example,Given n = 3, your program should return all 5 unique BST's shown below. 1 3 3 2 1 \ / / / \ \ 3 2 1 1 3 2 / / \ \ 2 1 2 3 代码: /** * Definit…

Binary Search                              [原文见:http://www.topcoder.com/tc?module=Static&d1=tutorials&d2=binarySearch]                                                                                                          作者 By lovro            …

A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes with keys less than the node's key. The right subtree of a node contains only nodes with keys greate…

Design an iterator over a binary search tree with the following properties: Elements are visited in ascending order (i.e. an inorder traversal) next() and hasNext() queries run in O(1) time in average. Example For the following binary search tree, in…

Given a binary search tree, print the elements in-order iteratively without using recursion. Note:Before you attempt this problem, you might want to try coding a pre-order traversal iterative solution first, because it is easier. On the other hand, c…

前言 先说一些题外的东西吧.受到春跃大神的影响和启发,推荐了这个算法公开课给我,晚上睡觉前点开一看发现课还有两天要开始,本着要好好系统地学习一下算法,于是就爬起来拉上两个小伙伴组团报名了.今天听了第一节课,说真的很实用,特别是对于我这种算法不扎实,并且又想找工作,提高自己的情况. 那就不多说废话了,以后每周都写个总结吧,就趁着这一个月好好把算法提高一下.具体就从:课堂笔记.leetcode和lintcode相关习题.hdu和poj相关习题三个方面来写吧.希望自己能够坚持下来,给大家分享一些好的东…