其实就是容斥原理了代码: 1 uses math; 2 const maxn=55000; 3 var i,n,a,b,c,d,w,tot:longint; 4 ans:int64; 5 sum,mu,p:array[0..maxn] of int64; 6 procedure ge...
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其他好文 时间:
2014-06-25 22:10:01
阅读次数:
299
PrintEcho print 输出转型$sum=0;$total=(float)$sumIsset() unset()判断一个变量是否存在$echo intval$sum 浮点型Define(“total”,100); 常量一旦定义就不可更改判断句14){Echo’内容’;}?>14){Echo’...
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Web程序 时间:
2014-06-25 21:47:59
阅读次数:
281
class Solution {public: int maxProfit(vector &prices) { int len = prices.size(); if (len < 1) return 0; int sum = 0; in...
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其他好文 时间:
2014-06-24 11:28:47
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193
声明函数指针的数组类似声明一般的指针数组。接上文例子将其改进为使用函数指针的数组,代码如下:
#include
using std::cout;
using std::endl;
//函数声明
double squared(double);
double cubed(double);
double sum_array(double array[],int len,double (*...
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编程语言 时间:
2014-06-22 22:46:44
阅读次数:
264
Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum.
For example:
Given the below binary tree and sum...
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其他好文 时间:
2014-06-22 20:59:24
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227
The partial sum problem
时间限制:1000 ms | 内存限制:65535 KB
难度:2
描述One day,Tom’s girlfriend give him an array A which contains N integers and asked him:Can you choose some integers from the N ...
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其他好文 时间:
2014-06-22 18:00:48
阅读次数:
166
Given a triangle, find the minimum path sum from top to bottom. Each step you may
move to adjacent numbers on the row below.
For example, given the following triangle
[
[2],...
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其他好文 时间:
2014-06-22 17:07:52
阅读次数:
166
题目来源:Light OJ 1272 Maximum Subset Sum
题意:选出一些数 他们的抑或之后的值最大
思路:每个数为一个方程 高斯消元 从最高位求出上三角 消元前k个a[i]异或和都能有消元后的异或和组成
消元前
k
个
a[i]
a[i]异或和都能有消元后的
异或和都能有消元后的
p
个
a[i]
a[i]的异或
的异或
保证每一列只有一个1 消元...
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其他好文 时间:
2014-06-22 16:58:09
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231
题目:
Given a binary tree containing digits from 0-9 only, each root-to-leaf
path could represent a number.
An example is the root-to-leaf path 1->2->3 which represents the number 123.
Find...
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其他好文 时间:
2014-06-22 08:30:24
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236
Given a binary tree and a sum, find all root-to-leaf paths where each path's sum equals the given sum.
For example:
Given the below binary tree and sum = 22,
5
/ ...
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其他好文 时间:
2014-06-21 22:44:58
阅读次数:
266