随笔分类 -  ~~Leetcode~~

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Leetcode 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?题目意思： 给定一个单链表，判断它是不是回文串 进一步思考： ... 阅读全文
posted @ 2015-08-02 17:12 OpenSoucre 阅读(305) 评论(0) 推荐(0)
Leetcode 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 @ 2015-08-02 15:50 OpenSoucre 阅读(268) 评论(0) 推荐(0)
Leetcode 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 @ 2015-08-02 15:44 OpenSoucre 阅读(293) 评论(0) 推荐(0)
Leetcode 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 @ 2015-07-07 19:43 OpenSoucre 阅读(1005) 评论(0) 推荐(0)
Leetcode Power of Two
摘要：Given an integer, write a function to determine if it is a power of two.题目意思： 给定一个整数，判断是否是2的幂解题思路： 如果一个整数是2的幂，则二进制最高位为1，减去1后则最高位变为0，后面全部是1，相与判读是否为零，... 阅读全文
posted @ 2015-07-07 16:21 OpenSoucre 阅读(178) 评论(0) 推荐(0)
Leetcode 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 @ 2015-07-07 16:09 OpenSoucre 阅读(302) 评论(0) 推荐(0)
Leetcode Maximum Product Subarray
摘要：Find the contiguous subarray within an array (containing at least one number) which has the largest product.For example, given the array[2,3,-2,4],the... 阅读全文
posted @ 2014-10-08 16:44 OpenSoucre 阅读(181) 评论(0) 推荐(0)
Leetcode Simplify Path
摘要：Given an absolute path for a file (Unix-style), simplify it.For example,path="/home/", =>"/home"path="/a/./b/../../c/", =>"/c"Corner Cases:Did you con... 阅读全文
posted @ 2014-07-15 22:04 OpenSoucre 阅读(143) 评论(0) 推荐(0)
Leetcode Unique Paths II
摘要：Follow up for "Unique Paths":Now consider if some obstacles are added to the grids. How many unique paths would there be?An obstacle and empty space i... 阅读全文
posted @ 2014-07-15 20:40 OpenSoucre 阅读(193) 评论(0) 推荐(0)
Leetcode Minimum Window Substring
摘要：Given a string S and a string T, find the minimum window in S which will contain all the characters in T in complexity O(n).For example,S="ADOBECODEBA... 阅读全文
posted @ 2014-07-15 12:13 OpenSoucre 阅读(239) 评论(0) 推荐(0)
Leetcode Candy
摘要：There areNchildren standing in a line. Each child is assigned a rating value.You are giving candies to these children subjected to the following requi... 阅读全文
posted @ 2014-07-08 22:17 OpenSoucre 阅读(363) 评论(0) 推荐(0)
Leetcode Word Ladder
摘要：Given two words (startandend), and a dictionary, find the length of shortest transformation sequence fromstarttoend, such that:Only one letter can be ... 阅读全文
posted @ 2014-07-08 21:46 OpenSoucre 阅读(221) 评论(0) 推荐(0)
Leetcode Copy List with Random Pointer
摘要：A linked list is given such that each node contains an additional random pointer which could point to any node in the list or null.Return a deep copy ... 阅读全文
posted @ 2014-07-08 21:04 OpenSoucre 阅读(241) 评论(0) 推荐(0)
Leetcode Sudoku Solver
摘要：Write a program to solve a Sudoku puzzle by filling the empty cells.Empty cells are indicated by the character'.'.You may assume that there will be on... 阅读全文
posted @ 2014-07-07 21:26 OpenSoucre 阅读(162) 评论(0) 推荐(0)
Leetcode Valid Sudoku
摘要：Determine if a Sudoku is valid, according to:Sudoku Puzzles - The Rules.The Sudoku board could be partially filled, where empty cells are filled with ... 阅读全文
posted @ 2014-07-07 20:59 OpenSoucre 阅读(198) 评论(0) 推荐(0)
Leetcode Permutations
摘要：Given a collection of numbers, return all possible permutations.For example,[1,2,3]have the following permutations:[1,2,3],[1,3,2],[2,1,3],[2,3,1],[3,... 阅读全文
posted @ 2014-07-05 21:22 OpenSoucre 阅读(158) 评论(0) 推荐(0)
Leetcode N-Queens II
摘要：Follow up for N-Queens problem.Now, instead outputting board configurations, return the total number of distinct solutions.class Solution {public: ... 阅读全文
posted @ 2014-07-05 21:02 OpenSoucre 阅读(147) 评论(0) 推荐(0)
Leetcode N-Queens
摘要：Then-queens puzzle is the problem of placingnqueens on ann×nchessboard such that no two queens attack each other.Given an integern, return all distinc... 阅读全文
posted @ 2014-07-05 20:42 OpenSoucre 阅读(164) 评论(0) 推荐(0)
Leetcode Word Search
摘要：Given a 2D board and a word, find if the word exists in the grid.The word can be constructed from letters of sequentially adjacent cell, where "adjace... 阅读全文
posted @ 2014-07-05 18:35 OpenSoucre 阅读(197) 评论(0) 推荐(0)
Leetcode Insert Interval
摘要：Given a set ofnon-overlappingintervals, insert a new interval into the intervals (merge if necessary).You may assume that the intervals were initially... 阅读全文
posted @ 2014-07-05 17:32 OpenSoucre 阅读(176) 评论(0) 推荐(0)

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