Little John is playing very funny game with his younger brother. There is one big box filled with M&Ms of different colors. At first John has to eat several M&Ms of the same color. Then his opponent has to make a turn. And so on. Please note that…

Description Little John is playing very funny game with his younger brother. There is one big box filled with M&Ms of different colors. At first John has to eat several M&Ms of the same color. Then his opponent has to make a turn. And so on. Pleas…

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…

HDU1907 http://acm.hdu.edu.cn/showproblem.php?pid=1907 两种情况1.当全是1时,要看堆数的奇偶性 2.判断是奇异局势还是非奇异局势 代码: #include<stdio.h> #include<iostream> using namespace std; int main() { int m,n; cin>>n; while(n--) { ; ; ]; cin>>m; ; i<m; i++) { c…

Description Little John is playing very funny game with his  younger brother. There  is one big box filled  with M&Ms of different colors. At first John has to eat several M&Ms of the same color. Then his  opponent has to make a turn. And so on. P…

Problem Description Little John is playing very funny game with his younger brother. There is one big box filled with M&Ms of different colors. At first John has to eat several M&Ms of the same color. Then his opponent has to make a turn. And so o…

思路: 注意与Nimm博弈的区别,谁拿完谁输! 先手必胜的条件: 1.  每一个小游戏都只剩一个石子了,且SG = 0. 2. 至少有一堆石子数大于1,且SG不等于0 证明:1. 你和对手都只有一种选择,随便怎么拿,你都赢了 2.  a:如果只有一堆石子数量大于1,那么你赢了,你可以拿完使得整个游戏的1的数量不变,剩余1个整个游戏1的数量增加. b:如果至少有两堆石子数大于1,那么你可以让SG变为0,令对手处于P态,并且当前至少有两堆数量大于1,对手无论怎么拿SG都会变成非0. 结论:当石子数量…

题意:n堆石头,拿走最后一块的输 思路:SJ定理:先手必胜当且仅当:(1)游戏的SG函数不为0且游戏中某个单一游戏的SG函数大于1:(2)游戏的SG函数为0且游戏中没有单一游戏的SG函数大于1. 参考:[博弈]Anti,Multi,Every-SG 代码: #include<set> #include<map> #include<stack> #include<cmath> #include<queue> #include<vector&g…

John Time Limit: 5000/1000 MS (Java/Others)    Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 3762    Accepted Submission(s): 2127 Problem Description Little John is playing very funny game with his younger brother. There is one big bo…

题目链接: PKU:http://poj.org/problem? id=3480 HDU:http://acm.hdu.edu.cn/showproblem.php? pid=1907 Description Little John is playing very funny game with his younger brother. There is one big box filled with M&Ms of different colors. At first John has to…