problem:
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 po...
分类:
系统相关 时间:
2015-05-05 19:42:16
阅读次数:
204
四种页面置换算法:
最佳(OPT,Optional)
最近最少使用(LRU,Least Recently Used)
先进先出(FIFO,First In First Out)
时钟(Clock)
一、最佳置换算法OPT 策略选择置换下次访问距当前时间最长的那些页,可以看出该算法能导致最少的缺页中断,但是由于它要求操作系统必须知道将来的事件,显然这是不可能实现的。但它仍然能作为一种标准来衡量其他算法...
分类:
编程语言 时间:
2015-05-04 08:42:40
阅读次数:
213
LRULimitedMemoryCache源码:
/**
* (cache size limited)Size of all stored bitmaps will not to exceed size limit.
* (删除策略LRU)When cache reaches limit size then the least recently used bitmap is delete...
分类:
移动开发 时间:
2015-05-03 10:39:25
阅读次数:
186
题目:Design and implement a data structure for Least Recently Used (LRU) cache. It should support the following operations:getandset.get(key)- Get the v...
分类:
系统相关 时间:
2015-05-01 22:31:03
阅读次数:
211
Write a SQL query to find all numbers that appear at least three times consecutively....
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其他好文 时间:
2015-05-01 17:29:32
阅读次数:
103
Given a dice with n sides, you have to find the expected number of times you have to throw that dice to see all its faces at least once. Assume that the dice is fair, that means when you throw the dic...
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其他好文 时间:
2015-05-01 12:08:28
阅读次数:
141
Given a dice with n sides, you have to find the expected number of times you have to throw that dice to see all its faces at least once. Assume that the dice is fair, that means when you throw the dice...
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其他好文 时间:
2015-04-30 18:22:36
阅读次数:
99
http://acm.hdu.edu.cn/showproblem.php?pid=1019题意:给出n个数,求它们的最小公倍数对于n个数,它们的最小公倍数等于【前n-1个数的最小公倍数和第n个数】的最小公倍数而前n-1个数的最小公倍数又等于【前n-2个数的最小公倍数和第n-1个数】的最小公倍数以此...
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其他好文 时间:
2015-04-28 20:48:14
阅读次数:
141
题目意思就是给你 一组32位的整数,让你求所给的这组数的所有数的最小公倍数。解题大致过程就是先对给出的这组数{a1,a2,a3...am}从小到大进行排序得到{b1,b2...bm},然后先求出b1和b2的最小公倍数,再以此最小公倍数和第三个数b3求出它们之间的最小公倍数,一直这样下去到bm,就能得...
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其他好文 时间:
2015-04-28 18:13:18
阅读次数:
107
【题目】Find the contiguous subarray within an array (containing at least one number) which has the largest sum.For example, given the array[?2,1,?3,4,?1,...
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其他好文 时间:
2015-04-28 11:34:29
阅读次数:
102