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Given a binary tree containing digits from0-9only, each root-to-leaf path could represent a number.An example is the root-to-leaf path1->2->3which rep... 阅读全文
posted @ 2015-04-14 13:26
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Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.For example,"A man, a plan, a canal: Pana... 阅读全文
posted @ 2015-04-13 16:47
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Given a binary tree, find the maximum path sum.The path may start and end at any node in the tree.For example:Given the below binary tree, 1 ... 阅读全文
posted @ 2015-04-13 16:12
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Given an indexk, return thekthrow of the Pascal's triangle.For example, givenk= 3,Return[1,3,3,1].Note:Could you optimize your algorithm to use onlyO(... 阅读全文
posted @ 2015-04-13 11:28
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GivennumRows, generate the firstnumRowsof Pascal's triangle.For example, givennumRows= 5,Return[ [1], [1,1], [1,2,1], [1,3,3,1], [1,4,6,4,1]... 阅读全文
posted @ 2015-04-13 11:19
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Follow up for problem "Populating Next Right Pointers in Each Node".What if the given tree could be any binary tree? Would your previous solution stil... 阅读全文
posted @ 2015-04-10 17:04
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Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; }Populate each next pointe... 阅读全文
posted @ 2015-04-10 16:28
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Given a stringSand a stringT, count the number of distinct subsequences ofTinS.A subsequence of a string is a new string which is formed from the orig... 阅读全文
posted @ 2015-04-10 14:26
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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 andsum =... 阅读全文
posted @ 2015-04-10 14:05
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Ubuntu 下配置 Git 是一个快速、可扩展的分布式版本控制系统，它具有极为丰富的命令集，对内部系统提供了高级操作和完全访问。 一、Git安装： 1、 二进制方式安装： $ sudo apt-get install git-core 安装完成后，在终端中输入 git 就可以看到相关的命令了。如果 阅读全文
posted @ 2015-04-10 11:29
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