$ \color{#0066ff}{ 题目描述 }$ Georgia and Bob decide to play a self-invented game. They draw a row of grids on paper, number the grids from left to right by 1, 2, 3, ..., and place N chessmen on different grids, as shown in the following figure for exam…

2D-Nim Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 3081   Accepted: 1398 Description The 2D-Nim board game is played on a grid, with pieces on the grid points. On each move, a player may remove any positive number of contiguous piece…

#include<stdio.h> #include<string.h> #include<algorithm> using namespace std; int main() { int t,n,ans; int i,j,js; ]; //int b[1100]; scanf("%d",&t); while(t--) { memset(a,,sizeof(a)); //memset(b,0,sizeof(b)); ans=; js=; sc…

Description The 2D-Nim board game is played on a grid, with pieces on the grid points. On each move, a player may remove any positive number of contiguous pieces in any row or column. The player who removes the last piece wins. For example, consider…

报告见代码.. #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> using namespace std; ; ][]={,,-,,,,,-}; int h,w,n; int maze[MAX][MAX]; int maze2[MAX][MAX]; struct{ int x,y; }save[]; int sa; ]; ]; void dfs(int…

发信人: fennec (fennec), 信区: Algorithm 标 题: acm 总结 by fennec 发信站: 吉林大学牡丹园站 (Wed Dec 8 16:27:55 2004) ACM总结(fennec) 其实在北京比赛完的时候,我就想写了,不过还是早了点,直到上海比赛结束,大家的心中都不是太好受.郭老师有句话:你们这样做也是对的,不成功就成仁.让我的心也能安慰了不少. 我是从大一下学期开始接触ACM的,那时候我们学校才刚刚起步,siyee,wjiang师兄可以说是我的领路人了…

A - Triangles 记忆化搜索呗.搜索以某三角形为顶的最大面积,注意边界情况. #include <stdio.h> #include <cstring> #include <cstdlib> #include <algorithm> #include <cmath> using namespace std; #define lson o<<1 #define rson o<<1|1 #define max(a,b…

博弈论/DP 这是Nim?这不是巴什博奕的变形吗…… 我也不会捉啊,不过一看最多只有20个人,每人最多拿16个石子,总共只有8196-1个石子,范围好像挺小的,嗯目测暴力可做. so,记忆化搜索直接水过去了…… 出口应该很好判断:当前只有一个石子的时候输,石子数<=m[i]+1则赢(保证拿完后只给对方留一个) Source Code Problem: User: sdfzyhy Memory: 1416K Time: 32MS Language: G++ Result: Accepted Sou…

博弈论 我哭……思路错误WA了6次?(好像还有手抖点错……) 本题是要求Nim游戏的第一步必胜策略有几种. 一开始我想:先全部异或起来得到ans,从每个比ans大的堆里取走ans个即可,答案如此累计……WA! 第二次:ans与每个a[i]取&,如果不为0即有一种方案……WA! 第三次:ans与每个a[i]取&,如果结果等于ans则有一种方案……WA! 第四次:ans与每个a[i]取^,如果结果<=a[i]则有一种方案……AC! sigh……果然应该“三思”而后行……(附一例子,25/…

题目:http://poj.org/problem?id=1704 思路:Nim游戏策略,做如下转换,如果N是偶数,则两两配对,将两个数之间的格子数(距离)看做成这一堆石头的数量. 如果N是奇数,则将一个0的格子放在第一个. 代码: #include<iostream> #include<algorithm> using namespace std; const int MAXN=10000+2; int N,P[MAXN]; int main() { int t; cin>…

(Nim积相关资料来自论文曹钦翔<从"k倍动态减法游戏"出发探究一类组合游戏问题>) 关于Nim积计算的两个函数流程: 代码实现如下: ][]={,,,}; int Nim_Multi_Power(int x,int y) { ) return m[x][y]; ; for(;;a++) <<(<<a))&&x<(<<(<<(a+)))) break; <<(<<a); int p…

Description Georgia and Bob decide to play a self-invented game. They draw a row of grids on paper, number the grids from left to right by 1, 2, 3, ..., and place N chessmen on different grids, as shown in the following figure for example: Georgia an…

Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 11357   Accepted: 3749 Description Georgia and Bob decide to play a self-invented game. They draw a row of grids on paper, number the grids from left to right by 1, 2, 3, ..., and place N c…

http://poj.org/problem?id=3533 变成三维的nim积..前面hdu那个算二维nim积的题的函数都不用改,多nim积一次就过了...longlong似乎不必要但是还是加上了 代码 #include<cstdio> #include<cstring> #include<algorithm> #include<cmath> #include<iostream> #include<map> #include<…

[题目链接] http://poj.org/problem?id=2975 [题目大意] 问在传统的nim游戏中先手必胜策略的数量 [题解] 设sg=a1^a1^a3^a4^………^an,当sg为0时为必败态, 因此先手只需改变一个aj,让其减少m,使得sg^aj^(aj-m)=0即可让对手处于必败态, 即先手必胜策略,因为异或为0的两个数相同,所以sg^aj=aj-m, 即m=aj-sg^aj,因为m大于0,所以aj>sg^aj,至此我们就得到了必胜策略的重要条件 [代码] #include…

Nim POJ - 2068 题目大意:多组数据,两人轮流操作,n轮一循环,给出总石子数和这n轮每次两人能取的石子上限(下限为1).取到最后一颗者输. /* f[i][j]表示在第i轮中一共有j个石子,先行者是否必胜 由于是取到最后一个的人输,那么如果一个石子都没有,先行者必胜,则f[i][0]初始化为1 */ #include<iostream> #include<cstdio> #include<cstring> #define maxn 10010 using n…

题目链接题意介绍了一遍Nim取石子游戏,可以看上一篇文章详细介绍.问当前状态的必胜走法个数,也就是走到必败状态的方法数. 我们设sg为所有个数的Xor值.首先如果sg==0,它不可能有必胜走法,输出0. 对于任意一堆有a[i]个石子,若sg Xor a[i] <= a[i] ,那么我们就可以在a[i]里面取出sg Xor a[i]个石子,使得剩下石子Xor和为0,于是ans++.然后输出ans. 注意C/C++语言中^操作比<操作优先级低. #include<iostream> #…

  Nim Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 4312   Accepted: 1998 Description Nim is a 2-player game featuring several piles of stones. Players alternate turns, and on his/her turn, a player’s move consists of removing one or m…

Nim Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 1501   Accepted: 845 Description Let's play a traditional game Nim. You and I are seated across a table and we have a hundred stones on the table (we know the number of stones exactly).…

Nim Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 5232   Accepted: 2444 Description Nim is a 2-player game featuring several piles of stones. Players alternate turns, and on his/her turn, a player’s move consists of removing one or mor…

http://poj.org/problem?id=2068 #include<iostream> #include<cstdio> #include<cstring> #include<algorithm> using namespace std; ][(<<)+];//dp[i][j]表示轮到第i个人取时,剩j个石头 ]; int DFS(int pos,int remain) { ) return dp[pos][remain];//记忆化…

题意: 每次可以向左移动一个棋子任意步,不能跨过棋子 很巧妙的转化,把棋子间的空隙看成石子堆 然后裸阶梯Nim #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> #include <cmath> using namespace std; typedef long long ll; ; inline int read(){ ,f=; ;c=ge…

题目链接 \(Description\) 一个1~INF的坐标轴上有n个棋子,给定坐标Pi.棋子只能向左走,不能跨越棋子,且不能越界(<1).两人每次可以将任意一个可移动的棋子向左移动一个单位.问先/后手会赢或是否无解. \(Solution\) 首先考虑相邻两个棋子 无论一个人怎么移动前边的棋子,后手都能移动后面棋子同样的距离使得这两个棋子间间隔不变(后手可以模仿.但是移动后面的棋子时,后手是不能模仿的) 同时两个棋子局面的终止是两个棋子相邻 不难想到以这两个棋子间距离为石子数做一个Nim游戏…

Nim Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 1403   Accepted: 791 Description Let's play a traditional game Nim. You and I are seated across a table and we have a hundred stones on the table (we know the number of stones exactly).…

Description Here is a simple game. In this game, there are several piles of matches and two players. The two player play in turn. In each turn, one can choose a pile and take away arbitrary number of matches from the pile (Of course the number of mat…

思路:三维Nim积 代码: #include<set> #include<map> #include<stack> #include<cmath> #include<queue> #include<vector> #include<cstdio> #include<cstring> #include<iostream> #include<algorithm> typedef long l…

[题目链接] http://poj.org/problem?id=2068 [题目大意] 给出两队人,交叉放置围成一圈,每个人能取的石子数有个上限,各不相同 轮流取石头,取到最后一块石头的队伍算输,问哪个队伍能赢 [题解] 用dp[i][j]记录第i个人取石头时候还有j个石头的状态, 显然j==0时候为必胜态,我们对每个状态搜索后继状态,如果能导向必败态则为必胜态, 否则必败,记忆化搜索即可. [代码] #include <cstdio> #include <cstring> us…

一.Description 有两堆石子,数量任意,可以不同.游戏开始由两个人轮流取石子.游戏规定,每次有两种不同的取法,一是可以在任意的一堆中取走任意多的石子:二是可以在两堆中同时取走相同数量的石子.最后把石子全部取完者为胜者.现在给出初始的两堆石子的数目,如果轮到你先取,假设双方都采取最好的策略,问最后你是胜者还是败者. Input 输入包含若干行,表示若干种石子的初始情况,其中每一行包含两个非负整数a和b,表示两堆石子的数目,a和b都不大于1,000,000,000. Output 输出对应…

Nim游戏:有n堆石子,每堆个数不一,两人依次捡石子,每次只能从一堆中至少捡一个.捡走最后一个石子胜. 先手胜负:将所有堆的石子数进行异或(xor),最后值为0则先手输,否则先手胜. ================================ Anti-Nim游戏:游戏与Nim游戏基本相同,只是捡走最后一个石子者输. 先手胜负:将所有堆的石子数进行异或(xor),如果异或结果为0且所有堆的石子数全为1,或者异或结果为0且存在数量大于1的石子堆,则先手胜.否则先手输. 该题即是Anti-Ni…

思路: nim博弈裸题 xor一下 //By SiriusRen #include <cstdio> using namespace std; int n,tmp,xx; int main(){ while(~scanf("%d",&n)){ tmp=0; while(n--)scanf("%d",&xx),tmp^=xx; puts(!tmp?"No":"Yes"); } }…