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【Leetcode】Partition List
Given a linked list and a valuex, partition it such that all nodes less thanxcome before nodes greater than or equal tox.You should preserve the origi...
分类:其他好文   时间:2014-05-22 03:53:29    阅读次数:313
LRU的C++实现引申出的迭代器问题
leetcode上刷题。碰到一题实现LRU算法的题目。LRU,Least recently used。是一种常见的cache和页面替换算法。算法和原理可以参阅相关wiki。leetcode上的这一题,时间要求很苛刻,如果达不到O(1)复杂度的话,基本上会TLE。所以,这一题如果用C++来解的话,需要...
分类:编程语言   时间:2014-05-22 03:34:16    阅读次数:353
leetcode Populating Next Right Pointers in Each Node
/**根据完美二叉树或者非完美二叉树都可以,利用左右子树的根节点的next节点信息来连接next*/public void connect(TreeLinkNode root){ if(root==null) return; //利用父节点的next...
分类:其他好文   时间:2014-05-22 03:03:39    阅读次数:183
LeetCode:ZigZag Conversion
题目链接 The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed ...
分类:其他好文   时间:2014-05-22 01:55:19    阅读次数:320
【LeetCode】Evaluate Reverse Polish Notation
Evaluate the value of an arithmetic expression inReverse Polish Notation.Valid operators are+,-,*,/. Each operand may be an integer or another express...
分类:其他好文   时间:2014-05-22 00:49:57    阅读次数:311
leetcode -day20 Add Two Numbers
1、 ?? Add Two Numbers  You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two num...
分类:其他好文   时间:2014-05-21 10:49:10    阅读次数:221
【leetcode】Divide Two Integers
题目:不用乘、除、取模运算来实现除法。 减法可以实现除法在是我们早就知道的,但是可能会出现问题,比如极端情况,a = 0x7FFFFFFF,b = 1,求a/b,这要减法运算多少次? 回想下我们开始学习计算机的时候,涉及到的进制之间的转换,就是给定你一个十进制数,写出他的二进制,刚开始的时候很傻,就按着书上的方法去不停的除以2,除以2,除以2,。。。可笑的是居然天真的算过1024的二进制,更可...
分类:其他好文   时间:2014-05-21 08:32:30    阅读次数:191
Leetcode:Reverse Linked List II 单链表区间范围内逆置
Reverse a linked list from position m to n. Do it in-place and in one-pass. For example: Given 1->2->3->4->5->NULL, m = 2 and n = 4, return 1->4->3->2->5->NULL. Note: Given m, n satisfy the fol...
分类:其他好文   时间:2014-05-21 07:18:02    阅读次数:301
LeetCode: Trapping Rain Water [041]
【题目】 Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining. For example, Given [0,1,0,2,1,0,1,3,2,1,2,1], return 6. The above elevation map is represente...
分类:移动开发   时间:2014-05-21 06:44:38    阅读次数:359
【Leetcode】Jump Game
Given an array of non-negative integers, you are initially positioned at the first index of the array.Each element in the array represents your maximu...
分类:其他好文   时间:2014-05-21 04:39:53    阅读次数:332
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