随笔分类 -  leedcode

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[leedcode 242] Valid Anagram
摘要：Given two stringssandt, write a function to determine iftis an anagram ofs.For example,s= "anagram",t= "nagaram", return true.s= "rat",t= "car", retur... 阅读全文
posted @ 2015-08-09 00:11 ~每天进步一点点~ 阅读(165) 评论(0) 推荐(0)
[leedcode 241] Different Ways to Add Parentheses
摘要：Given a string of numbers and operators, return all possible results from computing all the different possible ways to group numbers and operators. Th... 阅读全文
posted @ 2015-08-09 00:00 ~每天进步一点点~ 阅读(207) 评论(0) 推荐(0)
[leedcode 240] Search a 2D Matrix II
摘要：Write an efficient algorithm that searches for a value in anmxnmatrix. This matrix has the following properties:Integers in each row are sorted in asc... 阅读全文
posted @ 2015-08-08 23:36 ~每天进步一点点~ 阅读(243) 评论(0) 推荐(0)
[leedcode 239] Sliding Window Maximum
摘要：Given an arraynums, there is a sliding window of sizekwhich is moving from the very left of the array to the very right. You can only see theknumbers ... 阅读全文
posted @ 2015-08-08 20:51 ~每天进步一点点~ 阅读(201) 评论(0) 推荐(0)
[leedcode 238] Product of Array Except Self
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 @ 2015-08-08 20:13 ~每天进步一点点~ 阅读(138) 评论(0) 推荐(0)
[leedcode 237] Delete Node in a Linked List
摘要：Write a function to delete a node (except the tail) in a singly linked list, given only access to that node.Supposed the linked list is1 -> 2 -> 3 -> ... 阅读全文
posted @ 2015-08-08 19:48 ~每天进步一点点~ 阅读(109) 评论(0) 推荐(0)
[leedcode 236] Lowest Common Ancestor of a Binary Tree
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 @ 2015-08-08 19:41 ~每天进步一点点~ 阅读(224) 评论(0) 推荐(0)
[leedcode 235] Lowest Common Ancestor of a Binary Search Tree
摘要：Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST.According to thedefinition of LCA on Wikipedia: ... 阅读全文
posted @ 2015-08-08 18:34 ~每天进步一点点~ 阅读(250) 评论(0) 推荐(0)
[leedcode 234] Palindrome Linked List
摘要：Given a singly linked list, determine if it is a palindrome.Follow up:Could you do it in O(n) time and O(1) space?/** * Definition for singly-linked l... 阅读全文
posted @ 2015-08-08 18:04 ~每天进步一点点~ 阅读(111) 评论(0) 推荐(0)
[leedcode 233] Number of Digit One
摘要：Given an integer n, count the total number of digit 1 appearing in all non-negative integers less than or equal to n.For example:Given n = 13,Return 6... 阅读全文
posted @ 2015-08-08 17:32 ~每天进步一点点~ 阅读(107) 评论(0) 推荐(1)
[leedcode 232] Implement Queue using Stacks
摘要：Implement the following operations of a queue using stacks.push(x) -- Push element x to the back of queue.pop() -- Removes the element from in front o... 阅读全文
posted @ 2015-08-08 16:55 ~每天进步一点点~ 阅读(117) 评论(0) 推荐(0)
[leedcode 231] Power of Two
摘要：Given an integer, write a function to determine if it is a power of two.public class Solution { //注意0和负数都返回false！！！ /*public boolean isP... 阅读全文
posted @ 2015-08-08 16:38 ~每天进步一点点~ 阅读(189) 评论(0) 推荐(0)
[leedcode 230] Kth Smallest Element in a BST
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 @ 2015-08-08 16:15 ~每天进步一点点~ 阅读(102) 评论(0) 推荐(0)
[leedcode 229] Majority Element II
摘要：Given an integer array of sizen, find all elements that appear more than⌊ n/3 ⌋times. The algorithm should run in linear time and in O(1) space.public... 阅读全文
posted @ 2015-08-08 15:54 ~每天进步一点点~ 阅读(153) 评论(0) 推荐(0)
[leedcode 228] Summary Ranges
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"].public cl... 阅读全文
posted @ 2015-08-08 15:16 ~每天进步一点点~ 阅读(126) 评论(0) 推荐(0)
[leedcode 227] Basic Calculator II
摘要：Implement a basic calculator to evaluate a simple expression string.The expression string contains onlynon-negativeintegers,+,-,*,/operators and empty... 阅读全文
posted @ 2015-08-08 14:54 ~每天进步一点点~ 阅读(489) 评论(0) 推荐(0)
[leedcode 226] Invert Binary Tree
摘要：Invert a binary tree. 4 / \ 2 7 / \ / \1 3 6 9to 4 / \ 7 2 / \ / \9 6 3 1/** * Definition for a binary tree node... 阅读全文
posted @ 2015-08-08 14:16 ~每天进步一点点~ 阅读(93) 评论(0) 推荐(0)
[leedcode 225] Implement Stack using Queues
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 @ 2015-08-08 14:04 ~每天进步一点点~ 阅读(129) 评论(0) 推荐(0)
[leedcode 224] Basic Calculator
摘要：Implement a basic calculator to evaluate a simple expression string.The expression string may contain open(and closing parentheses), the plus+or minus... 阅读全文
posted @ 2015-08-08 13:17 ~每天进步一点点~ 阅读(211) 评论(0) 推荐(0)
[leedcode 223] Rectangle Area
摘要：Find the total area covered by tworectilinearrectangles in a2Dplane.Each rectangle is defined by its bottom left corner and top right corner as shown ... 阅读全文
posted @ 2015-08-07 23:22 ~每天进步一点点~ 阅读(112) 评论(0) 推荐(0)

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