poj3071 Football 题意:有2^n支球队比赛,每次和相邻的球队踢,两两淘汰,给定任意两支球队相互踢赢的概率,求最后哪只球队最可能夺冠. 我们可以十分显然(大雾)地列出转移方程(设$f[ i ][ j ]$为第 $j$ 支球队踢赢第 $i$ 场比赛的概率,$k$为枚举的对手): $f[ i ][ j ] += f[ i-1 ][ j ] * f[ i-1 ][ k ] * p[ j ][ k ]$ 现在问题来了:怎么枚举 k, k的范围是啥 我们先列出比赛的模型(a Tower,n=…

学习位运算在比赛的技巧 http://poj.org/problem?id=3071 Football Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 3075   Accepted: 1558 Description Consider a single-elimination football tournament involving 2n teams, denoted 1, 2, …, 2n. In each roun…

Description Consider a single-elimination football tournament involving 2n teams, denoted 1, 2, …, 2n. In each round of the tournament, all teams still in the tournament are placed in a list in order of increasing index. Then, the first team in the l…

题目 Consider a single-elimination football tournament involving 2n teams, denoted 1, 2, -, 2n. In each round of the tournament, all teams still in the tournament are placed in a list in order of increasing index. Then, the first team in the list plays…

http://poj.org/problem?id=3071 题意:有2^n个队伍,给出每两个队伍之间的胜率,进行每轮淘汰数为队伍数/2的淘汰赛(每次比赛都是相邻两个队伍进行),问哪只队伍成为冠军概率最大. 很基础. 代码 #include<cstdio> #include<cstring> #include<iostream> #include<algorithm> #include<cmath> #include<queue> u…

题意:n支队伍两两进行比赛,求最有可能获得冠军的队伍. 解题关键:概率dp,转移方程:$dp[i][j] +  = dp[i][j]*dp[i][k]*p[j][k]$表示第$i$回合$j$获胜的概率,原理为全概率公式. 如何判断相邻,通过位运算. 概率dp的过程就像是模拟的过程 复杂度:$O(n{2^n}{2^n})$ #include<cstdio> #include<cstring> #include<algorithm> #include<cstdlib&…

起因:在一场训练赛上.有这么一题没做出来. 题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=6829 题目大意:有三个人,他们分别有\(X,Y,Z\)块钱(\(1<=X,Y,Z<=1e6\)),钱数最多的(如果不止一个那么随机等概率的选一个)随机等可能的选另一个人送他一块钱.直到三个人钱数相同为止.输出送钱轮数的期望,如果根本停不下来,输出-1. 根据题目的意思,其实就是每次向包里随机加入一枚钱币,直到包里某种钱币数量达到 100.本题的核心是如何…

Description Consider a single-elimination football tournament involving 2n teams, denoted 1, 2, …, 2n. In each round of the tournament, all teams still in the tournament are placed in a list in order of increasing index. Then, the first team in the l…

http://poj.org/problem?id=3071 (题目链接) 题意 ${2^n}$个队伍打淘汰赛,输的被淘汰.第1个队打第2个队,第3个队打第4个队······给出第i个队伍打赢第j个队伍的概率p[i][j],求哪只队伍获得冠军的可能性最大 Solution 很简单,想到一个dp方程:${f_{i,j}}$表示第i轮,j胜出的概率.转移很显然: $${f_{i,j}=f_{i-1,j}×f_{i-1,k}×p_{j,k}}$$ 代码 // poj3071 #include<algo…

Football Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 3469   Accepted: 1782 Description Consider a single-elimination football tournament involving 2n teams, denoted 1, 2, …, 2n. In each round of the tournament, all teams still in the…

                                                                                             Football Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 2590   Accepted: 1315 Description Consider a single-elimination football tournament inv…

很久以前就见过的...最基本的概率DP...除法配合位运算可以很容易的判断下一场要和谁比.    from——Dinic算法                         Football Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 2499   Accepted: 1258 Description Consider a single-elimination football tournament involving…

The football foundation (FOFO) has been researching on soccer; they created a set of sensors to describe the ball behavior based on a grid uniformly distributed on the field. They found that they could predict the ball movements based on historical a…

时间限制:1000MS  内存限制:65535K 提交次数:0 通过次数:0 题型: 编程题   语言: C++;C Description As every one known, a football team has 11 players . Now, there is a big problem in front of the Coach Liu. The final contest is getting closer. Who is the center defense, the ful…

 Football Kit Time Limit:1000MS     Memory Limit:262144KB     64bit IO Format:%I64d & %I64u Submit Status Practice CodeForces 432B Description Consider a football tournament where n teams participate. Each team has two football kits: for home games,…

题目链接:http://acm.hdu.edu.cn/contests/contest_showproblem.php?cid=725&pid=1006 Football Games Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 3505    Accepted Submission(s): 655 Problem Descriptio…

B - Football Goal Time Limit:500MS     Memory Limit:65536KB     64bit IO Format:%I64d & %I64u Submit Status Practice URAL 1874 Description Unlike most students of the Mathematical Department, Sonya is fond of not only programming but also sports. One…

题目链接: Football Games 分析: 先将分数排序,然后 设当前队编号为p,设个指针为p+1,然后p>1,每次p-=2,指针右移一位p==1,指针指向的队-=1p==0,从指针开始到n,都减去2如果出现一个数小于0,判错,如果最后一个数非0,盘错其他判对 (如有反例请指正) 代码: #include <cstdio> #include <cstring> #include <cstdlib> #include <ctime> #includ…

H - Football BetsTime Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hust.edu.cn/vjudge/contest/view.action?cid=87493#problem/H Description While traveling to England, it is impossible not to catch the English passion for football. Almost everyon…

Football Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 2882   Accepted: 1466 Description Consider a single-elimination football tournament involving 2n teams, denoted 1, 2, …, 2n. In each round of the tournament, all teams still in the…

 Problem A: Football (aka Soccer)  The Problem Football the most popular sport in the world (americans insist to call it "Soccer", but we will call it "Football"). As everyone knows, Brasil is the country that have most World Cup title…

http://acm.hdu.edu.cn/showproblem.php?pid=1225 一道超级简单的题,就因为我忘记写return,就wa好久,拜托我自己细心一点. 学习的地方:不过怎么查找字符串并返回下标 Football Score Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 2739    Accepted Submis…

Football Games Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 802    Accepted Submission(s): 309 Problem Description A mysterious country will hold a football world championships---Abnormal Cup…

A. Vasya and Football time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Vasya has started watching football games. He has learned that for some fouls the players receive yellow cards, and fo…

B. Football Kit time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Consider a football tournament where n teams participate. Each team has two football kits: for home games, and for away games…

pid=34986" target="_blank" style="">题目连接:bnu 34986 Football on Table 题目大意:给出桌子的大小L,W,然后是球的起始位置sx,sy,以及移动的向量dx,dy.然后给出n.表示有n个杆,对于每一个杆.先给出位置x,以及杆上有多少个小人c,给出小人的宽度.再给出c个小人间的距离.如今问说球有多少个概率能够串过全部人. 解题思路.对于每一个杆求无阻挡的概率.注意概率 = 空隙 / 可移动的…

Football Games Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Problem Description A mysterious country will hold a football world championships---Abnormal Cup, attracting football teams and fans from all around th…

Football Games Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 5055    Accepted Submission(s): 904 Problem Description A mysterious country will hold a football world championships---Abnormal Cu…

A. Vasya and Football time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Vasya has started watching football games. He has learned that for some fouls the players receive yellow cards, and fo…

Problem 1124 - Football Coach Description It is not an easy job to be a coach of a football team. The season is almost over, only a few matches are left to play. All of sudden the team manager comes to you and tells you bad news: the main sponsor of…