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RSS订阅原创 Surrounded Regions-leetcode
题目：Given a 2D board containing 'X' and 'O', capture all regions surrounded by 'X'.A region is captured by flipping all 'O's into 'X's in that surrounded region.For example,X X X
2014-05-28 09:51:46
607
原创 leetcode题目：Sum Root to Leaf Numbers和Longest Consecutive Sequence
题目一：Given a binary tree containing digits from 0-9 only, each root-to-leaf path could represent a number.An example is the root-to-leaf path 1->2->3 which represents the number 123.Fin
2014-05-23 15:19:35
799
原创 leetcode题目：Palindrome Partitioning 和Palindrome Partitioning II
题目一：Given a string s, partition s such that every substring of the partition is a palindrome.Return all possible palindrome partitioning of s.For example, given s = "aab",Return [
2014-05-13 16:57:28
674
原创 leetcode题目：Clone Graph
题目：Clone an undirected graph. Each node in the graph contains a label and a list of its neighbors.OJ's undirected graph serialization:Nodes are labeled uniquely.We use # as a separat
2014-05-09 15:19:08
718
原创 leetcode题目：Candy
题目：There are N children standing in a line. Each child is assigned a rating value.You are giving candies to these children subjected to the following requirements:Each child must have at
2014-05-07 15:17:56
469
原创 leetcode题目：Single Number和Single Number II
题目：Given an array of integers, every element appears twice except for one. Find that single one.Note:Your algorithm should have a linear runtime complexity. Could you implement it without
2014-05-07 15:11:25
395
原创 leetcode题目：Copy List with Random Pointer
题目：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 of the list.思路：主要是深层复制的问题：本题比较简
2014-05-06 16:04:32
598
原创 leetcode题目：Word Break和Word Break II
题目一：Given a string s and a dictionary of words dict, determine if s can be segmented into a space-separated sequence of one or more dictionary words.For example, givens = "leetcode",dict
2014-05-06 15:59:22
1023
原创 leetcode题目：Linked List Cycle和Linked List Cycle II
题目一：Given a linked list, determine if it has a cycle in it.Follow up:Can you solve it without using extra space?题目二：Given a linked list, return the node where the cycle begins. If
2014-05-05 14:34:51
427
原创 leetcode题目：Reorder List
题目：Given a singly linked list L: L0→L1→…→Ln-1→Ln,reorder it to: L0→Ln→L1→Ln-1→L2→Ln-2→…You must do this in-place without altering the nodes' values.For example,Given {1,2,3,4}, reord
2014-05-05 10:41:22
441
原创 leetcode题目：Binary Tree Preorder Traversal
题目：Given a binary tree, return the preorder traversal of its nodes' values.For example:Given binary tree {1,#,2,3}, 1 \ 2 / 3return [1,2,3].Note: Recursi
2014-05-04 18:38:30
374
原创 leetcode题目：Binary Tree Postorder Traversal
题目：Given a binary tree, return the postorder traversal of its nodes' values.For example:Given binary tree {1,#,2,3}, 1 \ 2 / 3return [3,2,1].Note: Recurs
2014-05-04 17:10:33
360
原创 leetcode题目：LRU Cache
题目：Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations: get and set.get(key) - Get the value (will always be positive) of th
2014-05-04 14:27:30
510
原创 leetcode题目解答---Insertion Sort List
题目如下：Sort a linked list using insertion sort.使用插入排序法排列一个链表。
2014-04-24 19:37:10
461
原创 leetcode题目解答---- SortList
题目：Sort a linked list in O(n log n) time using constant space complexity.这题还是比较纠结的，因为对于时间he
2014-04-24 17:33:51
561
原创 leetcode题目解答--Max Points on a Line
题目见下：Given n points on a 2D plane, find the maximum number of points that lie on the same straight line.解析思路：1）
2014-04-23 15:40:47
502
原创 leetcode题目--Evaluate Reverse Polish Notation 答案
题目见下：Evaluate the value of an arithmetic expression in Reverse Polish Notation.Valid operators are +, -, *, /. Each operand may be an integer or another expression.Some examples:
2014-04-22 16:33:25
559
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