Portal --> CF375C Solution 一个有趣的事情:题目中有很大的篇幅在介绍如何判断一个位置在不在所围的多边形中 那么..给了方法当然就是要用啊 ​ 首先是不能包含\('B'\),处理方式很简单直接把他当成一个值为\(-inf\)的宝藏即可,这样所有的object就全部可以看成一类了,不需要再额外考虑 注意到object的总数很少,考虑状压,记\(vis[x][y][st]\)表示当前在\((x,y)\)这个点,射线与路径的交点数量为奇数的object的状态为\(st\),这种…

C - Circling Round Treasures 题意: 在一个$n*m$的地图上,有一些障碍,还有a个宝箱和b个炸弹.你从(sx,sy)出发,走四连通的格子.你需要走一条闭合的路径,可以自交,且围出来的复杂多边形内不能包含任何炸弹.你围出来的复杂多边形中包含的宝箱的价值和减去步数就是你的收益.求最大收益.$n,m \le 20,a + b \le 8$ 太坑了课件上的题意有问题一开始没说步数... 后来改上然后$inq[][][]$最后没从$2$改成$S$然后我就看着玄学的$inq$好…

C. Circling Round Treasures time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You have a map as a rectangle table. Each cell of the table is either an obstacle, or a treasure with a certain p…

A. Crazy Computer time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output ZS the Coder is coding on a crazy computer. If you don't type in a word for a c consecutive seconds, everything you typed…

B. Complete the Word time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output ZS the Coder loves to read the dictionary. He thinks that a word is nice if there exists a substring (contiguous segmen…

https://codeforces.com/contest/1256 A:Payment Without Change[思维] 题意:给你a个价值n的物品和b个价值1的物品,问是否存在取物方案使得价值为s 题解:min(s/n,a)*n+b>=s?YES:NO #include<iostream> #include<cstdio> #include<cstdlib> #include<cmath> #include<algorithm>…

java.lang.Math.Round()使用时候,处理方式整理,方便以后查找   /**  * 测试函数 2014-01-10  */ public class TestMath {     public static void main(String[] args) {         System.out.println("小数点后第一位=5");         System.out.println("正数:Math.round(11.5)=" + Mat…

Codeforces Round #551 (Div. 2) 算是放弃颓废决定好好打比赛好好刷题的开始吧 A. Serval and Bus 处理每个巴士最早到站且大于t的时间 #include <bits/stdc++.h> #define fi first #define se second #define pii pair<int,int> #define mp make_pair #define pb push_back #define space putchar(' ')…

You have a map as a rectangle table. Each cell of the table is either an obstacle, or a treasure with a certain price, or a bomb, or an empty cell. Your initial position is also given to you. You can go from one cell of the map to a side-adjacent one…

C. Efim and Strange Grade Efim just received his grade for the last test. He studies in a special school and his grade can be equal to any positive decimal fraction. First he got disappointed, as he expected a way more pleasant result. Then, he devel…