戳我去解题Givennnon-negative integersa1,a2, ...,an,
where each represents a point at coordinate (i,ai).nvertical lines are drawn
such that the two endpoint...
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其他好文 时间:
2014-07-22 23:09:34
阅读次数:
337
/** * Definition for binary tree * struct
TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) :
val(x), left(...
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其他好文 时间:
2014-07-22 23:07:34
阅读次数:
312
Given two binary trees, write a function to
check if they are equal or not.Two binary trees are considered equal if they are
structurally identical an...
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其他好文 时间:
2014-05-01 16:06:46
阅读次数:
427
组合数学、-排列组合数----sum求sum=sum*(m--)/i;int c(int
n,int m)//n下标,m上标{ int sum=1; for(int i=1;in-m) m=n-m; int temp=n; for(int
i=1;i1) { up[j]/=temp; d...
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其他好文 时间:
2014-05-01 01:07:44
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409
问题 等值首尾和 假设有一个数组x[],它有n个元素,每一个都大于零;称x[0] + x[1]
+ … + x[i]为前置和(Prefix Sum),而x[j] + x[j+1] + … + x[n-1]为后置和(Suffix
Sum)。试编写一个程序,求出x[]中有多少组相同的前置和与后置和。 最...
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其他好文 时间:
2014-05-01 00:14:05
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743
Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right which minimizes the sum of all numbers along its path.
Note: You can only move either down or right at...
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其他好文 时间:
2014-04-28 10:46:41
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311
Vector 计算 均值(mean) 和 方差(variance)
本文地址: http://blog.csdn.net/caroline_wendy
vector的数组, 计算均值和方差的最简方法.
代码:
double sum = std::accumulate(std::begin(resultSet), std::end(resultSet), 0.0);...
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编程语言 时间:
2014-04-28 10:44:42
阅读次数:
587
There is no involute formulation concerning factitiously activity of SKB Kontur in this problem. Moreover, there is no formulation at all.
Input
There is the only number N, 1 ≤ N ≤ 109.
O...
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其他好文 时间:
2014-04-27 21:38:05
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544
RSA is one of the most powerful methods to encrypt data. The RSA algorithm is described as follow:
> choose two large prime integer p, q
> calculate n = p × q, calculate F(n) = (p - 1) × (q - 1)
...
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其他好文 时间:
2014-04-27 21:37:59
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315
前几天去了两个比较牛的互联网公司面试,在sql这块都遇到问题了,哎,可惜呀,先把简单的梳理一下
成绩表 score
1、group by 使用
按某一个维度进行分组
例如:
求每个同学的总分
SELECT student,SUM(score) FROM score GROUP BY student
求每个同学的平均分
SELECT student,AVG(score) FR...
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数据库 时间:
2014-04-27 21:17:59
阅读次数:
614