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...
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其他好文 时间:
2014-05-22 03:53:29
阅读次数:
313
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...
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编程语言 时间:
2014-05-22 03:34:16
阅读次数:
353
/**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...
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其他好文 时间:
2014-05-22 03:03:39
阅读次数:
183
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 ...
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其他好文 时间:
2014-05-22 01:55:19
阅读次数:
320
Evaluate the value of an arithmetic expression
inReverse Polish Notation.Valid operators are+,-,*,/. Each operand may be an
integer or another express...
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其他好文 时间:
2014-05-22 00:49:57
阅读次数:
311
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...
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其他好文 时间:
2014-05-21 10:49:10
阅读次数:
221
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...
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其他好文 时间:
2014-05-21 08:32:30
阅读次数:
191
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...
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其他好文 时间:
2014-05-21 07:18:02
阅读次数:
301
【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...
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移动开发 时间:
2014-05-21 06:44:38
阅读次数:
359
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...
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其他好文 时间:
2014-05-21 04:39:53
阅读次数:
332