https://github.com/Premiumlab/Python-for-Algorithms--Data-Structures--and-Interviews/blob/master/Mock%20Interviews/Large%20Search%20Engine%20Company%20/Search%20Engine%20Company%20-%20Interview%20Problems%20-%20SOLUTIONS/On-Site%20Question%202%20-%20…

https://github.com/Premiumlab/Python-for-Algorithms--Data-Structures--and-Interviews/blob/master/Mock%20Interviews/Large%20Search%20Engine%20Company%20/Search%20Engine%20Company%20-%20Interview%20Problems%20-%20SOLUTIONS/On-Site%20Question%201%20-%20…

题意为抛n个骰子凑成的点数和大于或等于x的概率,刚开始用暴力枚举,虽然AC了,但时间为2.227s,然后百度了下别人的做法,交了一遍,靠,0.000s,然后看了下思路,原来是dp,在暴力的基础上记忆化搜索,把所有可能枚举出来再累加,然后自己也打了一遍,0.000sA了,做法是开一个二维数组,第一维是骰子个数,第二维是和x,然后一个只有可能是1,2,3,4,5,6,倒两个骰子时是1+1,2,3,4,5,6     2+1,2,3,4,5,6  3+...累加向上推即可 //暴力做法,2.227s…

//poj 4014 //sep9 #include <iostream> #include <algorithm> using namespace std; int n; struct DICE { int ids; int num; int a[128]; }d[1024]; int cmp1(DICE x,DICE y) { return x.num<y.num; } int cmp2(DICE x,DICE y) { return x.ids<y.ids; }…

本文包含代码案例和讲解,建议收藏,也顺便点个赞吧.欢迎各路朋友爱好者加我的微信讨论问题:cyx645016617. 在很多关于医学图像分割的竞赛.论文和项目中,发现 Dice 系数(Dice coefficient) 损失函数出现的频率较多,这里整理一下.使用图像分割,绕不开Dice损失,这个就好比在目标检测中绕不开IoU一样. 1 概述 Dice损失和Dice系数(Dice coefficient)是同一个东西,他们的关系是: \[DiceLoss = 1-DiceCoefficient \]…

​ 前言: 在深度学习和计算机视觉中,人们正在努力提取特征,为各种视觉任务输出有意义的表示.在一些任务中,我们只关注对象的几何形状,而不管颜色.纹理和照明等.这就是边界检测的作用所在. 关注公众号CV技术指南,及时获取更多计算机视觉技术总结文章. 问题定义 ​ 图1 边界检测 图1是一个边界检测的例子,顾名思义,边界检测是从图像中检测对象边界的任务.这是一个不适定的问题,因为问题设置本身存在歧义.如图所示,对于室内房间图像(左),ground truth(中)定义房间内的ground truth…

  期望DP +数学推导 Dice Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 337    Accepted Submission(s): 223Special Judge Problem Description You have a dice with m faces, each face contains a distinct…

次表面做的有些烦躁,既然如此,索性先记一下前一阵比较的PIXIE.3delight.prman的dice方式. 研究过reyes的人都知道dice,简而言之,就是为了生成高质量高精度的图片(电影CG),我们把一个grid或者叫patch打散成很多的microPolygon(以下简单记为mp),而每个mp的大小投影到屏幕上甚至小于一个像素(这个是可以设置的,mp的大小大约为一个像素的shadingrate倍).对于四边网格,dice是很显然的,将grid投影到屏幕上,根据投影后的大小计算在u和v方…

Description 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, the probability of occurring any fa…

A - Play the DiceTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hust.edu.cn/vjudge/contest/view.action?cid=87326#problem/A Description There is a dice with n sides, which are numbered from 1,2,...,n and have the equal possibility to show up…