随笔分类 -  leetCode

摘要:Given two binary strings, return their sum (also a binary string).For example,a ="11"b ="1"Return"100".题目并不复杂,以下是我的程序,后面是别人的程序,瞬间low了好大一截!冗长!!!!!!!cla... 阅读全文
posted @ 2015-07-28 23:03 朱传林 阅读(200) 评论(0) 推荐(0)
摘要:ln 是linux中又一个非常重要命令,它的功能是为某一个文件在另外一个位置建立一个同步的链接.当我们需要在不同的目录,用到相同的文件时,我们不需要在 每一个需要的目录下都放一个必须相同的文件,我们只要在某个固定的目录,放上该文件,然后在其它的目录下用ln命令链接(link)它就可以,不必重复 的占... 阅读全文
posted @ 2015-07-26 09:45 朱传林 阅读(212) 评论(0) 推荐(0)
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: Pana... 阅读全文
posted @ 2015-07-25 11:56 朱传林 阅读(127) 评论(0) 推荐(0)
摘要:Given a sorted integer array without duplicates, return the summary of its ranges.For example, given[0,1,2,4,5,7], return["0->2","4->5","7"].本题我采用的是最直... 阅读全文
posted @ 2015-07-24 11:17 朱传林 阅读(137) 评论(0) 推荐(0)
摘要:Description:Count the number of prime numbers less than a non-negative number,n.判断一个数是否是质数主要有以下几种方法:1)直接用该数除于所有小于它的数(非0,1),如果均不能被它整除,则其是质数;2)除以小于它一半的数... 阅读全文
posted @ 2015-07-24 09:58 朱传林 阅读(150) 评论(0) 推荐(0)
摘要:Given a column title as appear in an Excel sheet, return its corresponding column number.For example: A -> 1 B -> 2 C -> 3 ... Z -> 26 ... 阅读全文
posted @ 2015-07-24 08:51 朱传林 阅读(199) 评论(0) 推荐(0)
摘要:Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on the row below.For example, given the fol... 阅读全文
posted @ 2015-07-22 20:03 朱传林 阅读(126) 评论(0) 推荐(0)
摘要:Given a binary search tree, write a functionkthSmallestto find thekth smallest element in it.Note:You may assume k is always valid, 1 ≤ k ≤ BST's tota... 阅读全文
posted @ 2015-07-22 14:28 朱传林 阅读(163) 评论(0) 推荐(0)
摘要:Design a stack that supports push, pop, top, and retrieving the minimum element in constant time.push(x) -- Push element x onto stack.pop() -- Removes... 阅读全文
posted @ 2015-07-20 08:34 朱传林 阅读(163) 评论(0) 推荐(0)
摘要:Implement the following operations of a stack using queues.push(x) -- Push element x onto stack.pop() -- Removes the element on top of the stack.top()... 阅读全文
posted @ 2015-07-19 19:29 朱传林 阅读(126) 评论(0) 推荐(0)
摘要:Given an array ofnintegers wheren> 1,nums, return an arrayoutputsuch thatoutput[i]is equal to the product of all the elements ofnumsexceptnums[i].Solv... 阅读全文
posted @ 2015-07-19 19:02 朱传林 阅读(131) 评论(0) 推荐(0)
摘要:Given a binary tree, flatten it to a linked list in-place.For example,Given 1 / \ 2 5 / \ \ 3 4 6The flattened t... 阅读全文
posted @ 2015-07-17 18:31 朱传林 阅读(120) 评论(0) 推荐(0)
摘要:Given an array where elements are sorted in ascending order, convert it to a height balanced BST.取中间的结点作为根结点即平衡二叉树/** * Definition for a binary tree n... 阅读全文
posted @ 2015-07-17 17:03 朱传林 阅读(104) 评论(0) 推荐(0)
摘要:Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum.Fo... 阅读全文
posted @ 2015-07-17 16:46 朱传林 阅读(153) 评论(0) 推荐(0)
摘要:Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree.According to thedefinition of LCA on Wikipedia: “The lowest ... 阅读全文
posted @ 2015-07-17 10:03 朱传林 阅读(169) 评论(0) 推荐(0)