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Factorial Trailing Zeroes
Given an integern, return the number of trailing zeroes inn!.Note:Your solution should be in logarithmic time complexity.最初想法是计算里面能被5整除的数字的个数(因为能被2整除的...
分类:其他好文   时间:2015-01-16 16:25:27    阅读次数:130
为什么Hash函数 H(k) = k % m中 m 尽量不要为2的幂次 也不是要是2^i -1
为什么Hash函数 H(k) = k % m中 m 尽量不要为2的幂次 下面的截屏来自CLRS的11章 关于哈希函数的讨论 之前我就一直困惑,为什么             When using the division method, we usually avoid certain values of m. For example, m should...
分类:其他好文   时间:2015-01-16 13:06:56    阅读次数:196
依赖倒置原则
3.1 依赖倒置原则的定义 依赖倒置原则(Dependence Inversion Principle,简称DIP)这个名字看着有点别扭,“依赖”还“倒置”,这到底是什么意思?依赖倒置原则的原始定义是:High level modules should not depend upon low lev...
分类:其他好文   时间:2015-01-16 11:17:55    阅读次数:309
LeetCode--First Missing Positive
Given an unsorted integer array, find the first missing positive integer. For example, Given [1,2,0] return 3, and [3,4,-1,1] return 2. Your algorithm should run in O(n) time and uses constant...
分类:其他好文   时间:2015-01-16 10:05:38    阅读次数:136
[leetCode][012] Two Sum (1)
题目:Given an array of integers, find two numbers such that they add up to a specific target number.The function twoSum should return indices of the two...
分类:其他好文   时间:2015-01-15 21:35:19    阅读次数:115
[leetcode] Factorial Trailing Zeroes
Factorial Trailing ZeroesGiven an integern, return the number of trailing zeroes inn!.Note:Your solution should be in logarithmic time complexity.思路:不...
分类:其他好文   时间:2015-01-15 15:57:13    阅读次数:158
[LeetCode]1.Two Sum
【题目】 Given an array of integers, find two numbers such that they add up to a specific target number. The function twoSum should return indices of the two numbers such that they add up to the t...
分类:其他好文   时间:2015-01-15 12:57:02    阅读次数:174
LeetCode--Single Number
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 using ext...
分类:其他好文   时间:2015-01-15 11:05:40    阅读次数:207
LeetCode--Single Number II
Given an array of integers, every element appears three times except for one. Find that single one. Note: Your algorithm should have a linear runtime complexity. Could you implement it without usi...
分类:其他好文   时间:2015-01-15 11:03:15    阅读次数:157
Single Number
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 using ext...
分类:其他好文   时间:2015-01-14 23:01:20    阅读次数:402
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