软件环境 SketchUp Pro 2018 参考书籍 Google SketchUp Cookbook Trimming an Object 使用 Intersect with Model 裁剪物体. Cutting All Intersected Objects 一次性裁剪多个物体. Using Groups or Components to Create Cutting Objects 下图中,有两种样式的裁剪: a) 实体模型 b) 壳状模型 实体模型:裁剪后,保留了裁剪物体的部分表面,…
题目链接:Weights on Vertices and Edges 题目大意:有一个\(n\)个点\(m\)条边的无向图,点有点权,边有边权,问至少删去多少条边使得对于剩下的每一条边,它所在的联通块的点权值和大于等于该边的边权 其实是蛮简单的一道题目,为什么当时就自闭了呢... 正向删边明显不靠谱,于是我们考虑反向加边,答案就是\(m-\)加入的边数 我们按照边权排序,使用并查集维护点权值和,同时记录一个\(cnt\)数组表示当前存在于该联通块内但未加入答案的边数 如果说当前联通块的点权值和大…
Edges in MST 在用克鲁斯卡尔求MST的时候, 每个权值的边分为一类, 然后将每类的图建出来, 那些桥就是必须有的, 不是桥就不是必须有. #include<bits/stdc++.h> #define LL long long #define fi first #define se second #define mk make_pair #define PLL pair<LL, LL> #define PLI pair<LL, int> #define PI…
最近项目中使用一个翻拍身份证信息识别活体检测的第三方框架,在使用时会偶然性的出现崩溃的现象,经过查找是因为第三方框架中有释放的内存区域再次引用引起的,因而补充一下相关知识点. 在Xcode Edit Scheme中有这样几个属性: 下面是我在网上找到的相关英文的解释,非专业出身,简单翻译一下用于理解 Enable Scribble: Fill allocated memory with 0xAA and deallocated memory with 0x55. Scribble…
136. Erasing Edges time limit per test: 0.25 sec. memory limit per test: 4096 KB Little Johnny painted on a sheet of paper a polygon with N vertices. Then, for every edge of the polygon, he drew the middle point of the edge. After that, he went to sc…
Deleting Edges Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 567 Accepted Submission(s): 210 Problem Description Little Q is crazy about graph theory, and now he creates a game about grap…
题目链接: http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=GRL_1_B Single Source Shortest Path (Negative Edges) Input An edge-weighted graph G (V, E) and the source r. |V| |E| r s0 t0 d0 s1 t1 d1 : s|E|−1 t|E|−1 d|E|−1 |V| is the number of vert…
An apparatus, system, and method are provided for automatically minimizing Real-Time (RT) task latency and maximizing Non-Real Time (NRT) task throughput. The apparatus may include a task manager, a determination module, and optionally a tracking mod…
D. Binary String Minimizing You are given a binary string of length n (i. e. a string consisting of n characters '0' and '1'). In one move you can swap two adjacent characters of the string. What is the lexicographically minimum possible string you c…
学习过程,把代码过程较好的代码段做个记录,如下的代码段是关于Python illustrating Downhill simplex method for minimizing the user-supplied scalar function的代码,应该能对各位朋友有较大用途. ''' x = downhill(F,xStart,side,tol=1.0e-6) Downhill simplex method for minimizing the user-supplied scalar fu…
这两道都用到了线段树分治和按秩合并可撤销并查集. Shortest Path Queries 给出一个连通带权无向图,边有边权,要求支持 q 个操作: x y d 在原图中加入一条 x 到 y 权值为 d 的边 x y 把图中 x 到 y 的边删掉 x y 表示询问 x 到 y 的异或最短路 保证任意操作后原图连通无重边自环且操作均合法 n,m,q≤200000 题解 与WC2011 最大XOR和路径一样,先考虑没有加边删边的做法 做出原图的任意一棵生成树 把每个非树边和树边形成的环丢进线性基里…
F. Simple Cycles Edges time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output You are given an undirected graph, consisting of nn vertices and mm edges. The graph does not necessarily connected.…