Aeroplane chess Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 1182    Accepted Submission(s): 802 Problem Description Hzz loves aeroplane chess very much. The chess map contains N+1 grids lab…
主题链接:点击打开链接 题意: 要在一条直线上摆多米诺骨牌. 输入n, l, r 要摆n张排,每次摆下去向左倒的概率是l, 向右倒的概率是r 能够採取最优策略.即能够中间放一段.然后左右两边放一段等,摆放顺序随意. 问:在最佳策略下要摆成n张牌的期望次数. 思路: 点击打开链接 #include <cstdio> #include <iostream> #include <cstring> #include <queue> #include <algo…
题意:某人掷骰子,数轴上前进相应的步数,会有瞬移的情况,求从0到N所需要的期望投掷次数. 解题关键:期望dp的套路解法,一个状态可以转化为6个状态,则该状态的期望,可以由6个状态转化而来.再加上两个状态的消耗即可. #include<cstdio> #include<cstring> #include<algorithm> #include<cstdlib> #include<cmath> #include<iostream> usi…
题意 抄袭自https://www.cnblogs.com/Paul-Guderian/p/7624039.html 正在玩飞行棋.输入n,m表示飞行棋有n个格子,有m个飞行点,然后输入m对u,v表示u点可以直接飞向v点,即u为飞行点.如果格子不是飞行点,扔骰子(1~6等概率)前进.否则直接飞到目标点.每个格子是唯一的飞行起点,但不是唯一的飞行终点.问到达或越过终点的扔骰子期望数. 从0出发!! Sol 比较zz的期望dp 设$f[i]$表示从$i$出发,到达$n$的期望步数 转移的时候讨论一下…
http://acm.hdu.edu.cn/showproblem.php?pid=4405 题意:在一个1×n的格子上掷色子,从0点出发,掷了多少前进几步,同时有些格点直接相连,即若a,b相连,当落到a点时直接飞向b点.求走到n或超出n期望掷色子次数 分析:简单的题目,拿来入门很不错: 如果没有飞机的线 ,这题就是直接 dp[i]+=dp[i+x]/6 +1 了 : 当前的期望由子期望相加 : 那航线怎么考虑呢?一开始我以为是加上可以走到点的dp[v] ,可是仔细推敲这是不对了,在注意到航线的…
Aeroplane chess Time Limit: 1 Sec  Memory Limit: 32 MB[Submit][Stataus][Discuss] Description Hzz loves aeroplane chess very much. The chess map contains N+1 grids labeled from 0 to N. Hzz starts at grid 0. For each step he throws a dice(a dice have s…
Aeroplane chess Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1597    Accepted Submission(s): 1088 Problem Description Hzz loves aeroplane chess very much. The chess map contains N+1 grids lab…
Aeroplane chess Problem Description Hzz loves aeroplane chess very much. The chess map contains N+1 grids labeled from 0 to N. Hzz starts at grid 0. For each step he throws a dice(a dice have six faces with equal probability to face up and the number…
题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=4405 Aeroplane chess Time Limit: 2000/1000 MS (Java/Others)Memory Limit: 32768/32768 K (Java/Others) 问题描述 Hzz loves aeroplane chess very much. The chess map contains N+1 grids labeled from 0 to N. Hzz s…
http://acm.hdu.edu.cn/showproblem.php?pid=4405 看了一下这个博客http://kicd.blog.163.com/blog/static/126961911200910168335852/ Aeroplane chess Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1336    Acce…