2018 German Collegiate Programming Contest (GCPC 18) Attack on Alpha-Zet 建树,求lca 代码: #include <algorithm> #include <iterator> #include <iostream> #include <cstring> #include <cstdlib> #include <iomanip> #include <bit…

layout: post title: 2018 German Collegiate Programming Contest (GCPC 18) author: "luowentaoaa" catalog: true tags: mathjax: true - codeforces 传送门 付队博客 C.Coolest Ski Route (记忆化搜索) 题意 给出一个有向图,求出一个权值最长的链, 题解 暴力dfs会超时,所以直接储存每个起点能走到的最远距离 #include<…

B .Battle Royale 题意:给你两个点A,B,以及一个圆S,保证两个点在圆外,且其连线与圆相交,求两点间最短距离. 思路:显然是要分别与圆相切,然后在圆弧想走,直到相交. 那么ans=与圆相交的直线距离+圆弧上的距离: 前者不难求. 后者的话有些抽象,因为不知道怎么取固定角度,但是如果想到atan2了就不难了,因为atan2求出的角度是固定了标准的,注意对用两个atan2求出来的角度求其夹角时,注意不要错过2pi:同时取min(angle,2*pi-angle).  还不懂的,看代码…

layout: post title: (寒假开黑gym)2017-2018 ACM-ICPC German Collegiate Programming Contest (GCPC 2017) author: "luowentaoaa" catalog: true tags: mathjax: true - codeforces 传送门 付队! 许老师! B.Buildings (polya定理) 题意 B:给你m面墙,每面墙是n*n的格子,你有c种颜色,问你有多少种涂色方案.用po…

$$2017-2018\ ACM-ICPC\ German\ Collegiate\ Programming\ Contest (GCPC 2017)$$ \(A.Drawing\ Borders\) \(B.Buildings\) Polya定理搞一搞 //#pragma GCC optimize("O3") //#pragma comment(linker, "/STACK:1024000000,1024000000") #include<bits/std…

$$2015\ German\ Collegiate\ Programming\ Contest\ (GCPC 15) + POI 10-T3$$ \(A.\ Journey\ to\ Greece\) 状压DP,TSP,先考虑找出这些关键点之间的最短路,然后就是旅行商问题,其中可以用一次\(taxi\),考虑\(dp\)状态为\(f[i][msk][tag]\),表示当前所在位置为\(i\)点,已经经过的节点集合为\(msk\),是否用过\(taxi\)的情况下,所化的最小时间,最后再从走遍了…

A Drawing Borders 很多构造方法,下图可能是最简单的了 代码: #include<bits/stdc++.h> using namespace std; ; struct Point{ int x,y; }; Point a[maxn]; ; Point b[maxn]; ; vector<pair<double,double> > va; vector<pair<double,double> > vb; void checka(…

A. Drawing Borders Unsolved. B. Buildings Unsolved. C. Joyride Upsolved. 题意: 在游乐园中,有n个游玩设施,有些设施之间有道路,给出每个设施需要花费的时间和价格,以及经过每条道路的时间,求从设施1出发恰好回到设施1恰好花费时间x的最小花费. 思路: $dist[i][j] 表示 第i个时刻 到第j个点的最小花费  从<t[1], 1> -> <x, 1>$ 跑最短路即可 #include <bit…

Battle Royale games are the current trend in video games and Gamers Concealed Punching Circles (GCPC) is the most popular game of them all. The game takes place in an area that, for the sake of simplicity, can be thought of as a two-dimensional plane…

John loves winter. Every skiing season he goes heli-skiing with his friends. To do so, they rent a helicopter that flies them directly to any mountain in the Alps. From there they follow the picturesque slopes through the untouched snow. Of course th…