【HDOJ5979】Convex（三角函数）

【【HDOJ5979】Convex（三角函数）】的更多相关文章

【HDOJ5979】Convex（三角函数）

题意:n个点在一个半径为R的圆上,给出这n个点顺时针的夹角差值,求这n个点的凸包面积 n<=10,R<=10 思路:S=1/2*sinθ*a*b 角度转弧度再用sin C++有点小毛病,叫队友改了下 #include<cstdio> #include<cstring> #include<string> #include<cmath> #include<iostream> #include<algorithm> #inclu…

[LeetCode] Convex Polygon 凸多边形

Given a list of points that form a polygon when joined sequentially, find if this polygon is convex (Convex polygon definition). Note: There are at least 3 and at most 10,000 points. Coordinates are in the range -10,000 to 10,000. You may assume the…

Leetcode: Convex Polygon

Given a list of points that form a polygon when joined sequentially, find if this polygon is convex (Convex polygon definition). Note: There are at least 3 and at most 10,000 points. Coordinates are in the range -10,000 to 10,000. You may assume the…

low-rank 的相关求解方法 (CODE) Low-Rank Matrix Recovery and Completion via Convex Optimization

(CODE) Low-Rank Matrix Recovery and Completion via Convex Optimization 这个是来自http://blog.sina.com.cn/s/blog_631a4cc401012wah.html这个链接,我这里借用下,这个博客有个小小的问题,我更新域名后可以打开,这里记录一下,也分享一下. 如第一个zip文件的地址是http://perception.csl.uiuc.edu/matrix-rank/Files/inexact_alm…

关于shape_trans (ConnectedRegions, ConvexRegions, 'convex')的作用于对比

* crystal.hdev: extraction of hexagonally shaped crystals via local thresholding and region post-processing* dev_close_window ()dev_update_window ('off')* ***** step: acquire image* ****read_image (Image, 'crystal')get_image_size (Image, Width, Heigh…

canvas三角函数应用

这个是圆圈旋转的简单案例 var canvas=document.getElementById("canvas"); var cxt=canvas.getContext("2d"); function fil(){ a+=0.05; cxt.clearRect(0,0,canvas.width,canvas.height) cxt.fillStyle="red"; cxt.beginPath(); cxt.arc((Math.sin(a)+1)*…

论文阅读之　A Convex Optimization Framework for Active Learning

A Convex Optimization Framework for Active Learning Active learning is the problem of progressively selecting and annotating the most informative unlabeled samples, in order to obtain a high classification performance. 目前AL方法存在的问题有: 1.大部分AL算法在预训练分类器之…