Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 8263   Accepted: 3452 Description Beads of red, blue or green colors are connected together into a circular necklace of n beads ( n < 24 ). If the repetitions that are produced by rotation…

Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 9359   Accepted: 3862 Description Beads of red, blue or green colors are connected together into a circular necklace of n beads ( n < 24 ). If the repetitions that are produced by rotation…

Polya定理:设G={π1,π2,π3........πn}是X={a1,a2,a3.......an}上一个置换群,用m中颜色对X中的元素进行涂色,那么不同的涂色方案数为:1/|G|*(mC(π1)+mC(π2)+mC(π3)+...+mC(πk)). 其中C(πk)为置换πk的循环节的个数. Polya定理的基础应用. 你得算出旋转和翻转时,每种置换的循环节数. 旋转时,每种置换的循环节数为gcd(n,i): 翻转时,若n为奇数,共有n个循环节数为n+1>>1的置换, 若n为偶数,共有n…

题目:http://poj.org/problem?id=1286 真·Polya定理模板题: 写完以后感觉理解更深刻了呢. 代码如下: #include<iostream> #include<cstdio> #include<cstring> using namespace std; typedef long long ll; int n; ll ans; ll pw(ll a,int b) { ll ret=; ,a*=a) )ret*=a; return ret;…

非常裸的polya,只是我看polya看了非常久 吉大ACM模板里面也有 #include <cstdio> #include <cmath> #include <iostream> using namespace std; long long gcd(long long a,long long b) { return b==0?a:gcd(b,a%b); } int main() { #ifndef ONLINE_JUDGE //freopen("G:/1.…

Necklace of Beads 大意:3种颜色的珠子,n个串在一起,旋转变换跟反转变换假设同样就算是同一种,问会有多少种不同的组合. 思路:正规学Polya的第一道题,在楠神的带领下,理解的还算挺快的.代码没什么好说的,裸的Polya.也不须要优化. /************************************************************************* > File Name: POJ1286.cpp > Author: GLSilence &…

Necklace of Beads Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 7763   Accepted: 3247 Description Beads of red, blue or green colors are connected together into a circular necklace of n beads ( n < 24 ). If the repetitions that are pro…

Necklace of Beads Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 7874   Accepted: 3290 Description Beads of red, blue or green colors are connected together into a circular necklace of n beads ( n < 24 ). If the repetitions that are pro…

Necklace of Beads Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 7451   Accepted: 3102 Description Beads of red, blue or green colors are connected together into a circular necklace of n beads ( n < 24 ). If the repetitions that are pro…

Necklace of Beads Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 630    Accepted Submission(s): 232 Problem Description Beads of red, blue or green colors are connected together into a circular…