Gym 101047M Removing coins in Kem Kadrãn Time Limit:2000MS     Memory Limit:65536KB     64bit IO Format:%I64d & %I64u Practice Description standard input/output Andréh and his friend Andréas are board-game aficionados. They know many of their friend…

给定一个序列,只能拿走D,隔壁的会翻转,问能否全部拿走. 注意到如果能拿走的话,拿D的顺序是没关系的.模拟即可 #include <cstdio> #include <cstdlib> #include <cstring> #include <cmath> #include <algorithm> using namespace std; #define inf (0x3f3f3f3f) typedef long long int LL; #in…

构造题都是神仙题 /kk ARC066C Addition and Subtraction Hard 首先要发现两个性质: 加号右边不会有括号:显然,有括号也可以被删去,答案不变. \(op_i\)和\(A_{i+1}\)之间只会有一个括号:有多个括号的话只保留最外边那个,答案不变. 然后就可以定义状态:\(dp_{i,j}\)表示前\(i\)个数,还有\(j\)个未闭合的左括号,得到的最大答案. 由于只有减号右边有括号,所以只要知道左边有几个未闭合的左括号,就可以知道自己的贡献是\(1\)还是…

鉴于Codeforces和atcoder上有很多神题,即使发呆了一整节数学课也是肝不出来,所以就记录一下. AGC033B LRUD Game 只要横坐标或者纵坐标超出范围就可以,所以我们只用看其中一维就可以了. 我们又知道,如果先手想要让它从左边出去,那么先手就会一直Left,后手就会一直Right. 所以枚举四种情况(L,R,U,D)就可以了. AGC033C Removing Coins 首先我们考虑链的情况,如果选的是端点,那么有一个点没有硬币,如果选的不是端点,那么有两个点没有硬币.所…

目录 A. Darker and Darker B. LRUD Game 题面 题解 代码 C. Removing Coins 题面 题解 代码 D. Complexity 题面 题解 代码 E. Go around a Circle F. Adding Edges 总结 题目有点神仙,被虐爆了. A. Darker and Darker \(Bfs\) 水题,没用,不写了. B. LRUD Game 题面 LRUD Game 有一个 \(n\times m\) 的棋盘,横纵坐标均从 \(1\)…

AGC033 A - Darker and Darker 直接BFS #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(' ') #define enter putchar('\n') #define eps 1e-10 #define…

You have a total of n coins that you want to form in a staircase shape, where every k-th row must have exactly k coins. Given n, find the total number of full staircase rows that can be formed. n is a non-negative integer and fits within the range of…

传送门 Description Hasan and Bahosain want to buy a new video game, they want to share the expenses. Hasan has a set of N coins and Bahosain has a set of M coins. The video game costs W JDs. Find the number of ways in which they can pay exactly W JDs su…

Swift 提示:Initialization of variable was never used consider replacing with assignment to _ or removing it 的原因: var //代表变量,变量的值可以改变 let//代表常量类型不可改变 var ceshi:Double = 10//假如声明的变量没有改变的话Swift也会提示将其改为let,而且在下面的代码中没有用到该变量Swift就会提示将let改为下划线,因为下划线代表忽略该变量,就相…

http://acm.csu.edu.cn/OnlineJudge/problem.php?id=1119 1119: Collecting Coins Time Limit: 3 Sec  Memory Limit: 128 MBSubmit: 144  Solved: 35[Submit][Status][Web Board] Description In a maze of r rows and c columns, your task is to collect as many coin…