A Simple Nim Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 79    Accepted Submission(s): 48 Problem Description Two players take turns picking candies from n heaps,the player who picks the las…

A Simple Nim Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Problem Description Two players take turns picking candies from n heaps,the player who picks the last one will win the game.On each turn they can pick an…

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A Simple Nim 题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=5795 Description Two players take turns picking candies from n heaps,the player who picks the last one will win the game.On each turn they can pick any number of candies which come from the…

A Simple Nim Problem Description   Two players take turns picking candies from n heaps,the player who picks the last one will win the game.On each turn they can pick any number of candies which come from the same heap(picking no candy is not allowed)…

SG打表找规律 HDU 5795 题目连接 #include<iostream> #include<cstdio> #include<cmath> #include<algorithm> #include<cstring> using namespace std; #define MAXN 10000 int sg[MAXN],visit[MAXN]; int getsg(int n) { int i,j; ) return sg[n]; mem…

题意:在nim游戏的规则上再增加了一条,即可以将任意一堆分为三堆都不为0的子堆也视为一次操作. 分析:打表找sg值的规律即可. 感想:又学会了一种新的方法,以后看到sg值找不出规律的,就打表即可~ 打表代码如下: #include <stdio.h> #include <algorithm> #include <string.h> #include <set> using namespace std; +]; int main() { sg[] = ; ;i…

打表找SG函数规律. #pragma comment(linker, "/STACK:1024000000,1024000000") #include<cstdio> #include<cstring> #include<cmath> #include<algorithm> #include<vector> #include<map> #include<set> #include<queue>…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=3915 题目大意是给了n个堆,然后去掉一些堆,使得先手变成必败局势. 首先这是个Nim博弈,必败局势是所有xor和为0. 那么自然变成了n个数里面取出一些数,使得xor和为0,求取法数. 首先由xor高斯消元得到一组向量基,但是这些向量基是无法表示0的. 所以要表示0,必须有若干0来表示,所以n-row就是消元结束后0的个数,那么2^(n-row)就是能组成0的种数. 对n==row特判一下. 代码:…

题意:    n堆石子,先拿光就赢,操作分为两种:        1.任意一堆中拿走任意颗石子        2.将任意一堆分成三小堆 ( 每堆至少一颗 )        分析:    答案为每一堆的SG函数值异或和.    故先打表寻找单堆SG函数规律.    其中,若 x 可分为 三堆 a,b,c ,则 SG[x] 可转移至子状态 SG[a] ^ SG[b] ^ SG[c]  (三堆SG值异或和)        打表后发现:        SG[ 8*k - 1 ] = 8*k       …