11722 - Joining with Friend You are going from Dhaka to Chittagong by train and you came to know one of your old friends is goingfrom city Chittagong to Sylhet. You also know that both the trains will have a stoppage at junctionAkhaura at almost same…

题意:某两个人 A,B 要在一个地点见面,然后 A 到地点的时间区间是 [t1, t2],B 到地点的时间区间是 [s1, s2],他们出现的在这两个区间的每个时刻概率是相同的,并且他们约定一个到了地点,等待另一个人 w 分钟,问你他们可能见面的概率是多少. 析:就是一个高中的一个几何概率的典型例题,他们相遇的条件是 |s -t | <= w,然后在画出二维图,再求面积即可,现在问题的情况是有好多种,所以需要我们进行分类讨论,答案其实就是下面那条直线上面的在矩形内的面积减去上面那条直线上面的在矩…

                        Joining with Friend You are going from Dhaka to Chittagong by train and you came to know one of your old friends is goingfrom city Chittagong to Sylhet. You also know that both the trains will have a stoppage at junctionAkhaur…

几何概型,<训练指南>的题.分类讨论太神啦我不会,我只会萌萌哒的simpson强上~这里用正方形在y=x-w的左上方的面积减去在y=x+w左上方的面积就是两条直线之间的面积,然后切出来的每一小段肯定是梯形或三角形,所以可以写得和一般的Simpson有点区别. #include<cstdio> ; int a1,a2,b1,b2,w; double f1(double x){ if(x+w<=b1)return b2-b1; ; } double f2(double x){ i…

Joining with Friend You are going from Dhaka to Chittagong by train and you came to know one of your old friends is going from city Chittagong to Sylhet. You also know that both the trains will have a stoppage at junction Akhaura at almost same time.…

转载自:https://ilmatte.wordpress.com/2013/01/06/entity-framework-joining-in-memory-data-with-dbset/ The argument of this post is relevant to people using Entity Framework and needing to filter data coming from a Database with a list of in-memory data. I…

题目连接:uva 11722 - Joining with Friend 题目大意:你和朋友乘火车,而且都会路过A市.给定两人可能到达A市的时段,火车会停w.问说两人能够见面的概率. 解题思路:y = x + w 和y = x - w在给定时间内围成的面积除以时间的总面积,就是求面积的时候要分情况处理. #include <cstdio> #include <cstring> #include <algorithm> using namespace std; int t…

How to quickly become effective when joining a new company The other day my colleague Richard asked me how I managed to get started at Lumi quite so quickly. It's a good question. When I started here I was pretty much doing useful work from my second…

文章标题 Apache Spark as a Compiler: Joining a Billion Rows per Second on a Laptop Deep dive into the new Tungsten execution engine 作者介绍 Sameer Agarwal, Davies Liu and Reynold Xin 文章正文 参考文献 https://databricks.com/blog/2016/05/23/apache-spark-as-a-compile…

Joining IEnumerable<TOuter>, IEnumerable<TInner>→IEnumerable<TResult> Operator 说明 SQL语义 Join 应用一种查询策略来匹配两个集合中的元素,产生一个平展的结果集 INNER JOIN GroupJoin 同上,但是产生一个层次结果集 INNER   JOIN, LEFT   OUTER JOIN Join & GroupJoin Arguments 参数 类型 外层/Outer…