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Hdu 1016 Prime Ring Problem (素数环经典dfs)

Prime Ring Problem Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 20105    Accepted Submission(s): 9001 Problem Description A ring is compose of n circles as shown in diagram. Put natural numb…

题目1459：Prime ring problem(素数环问题——递归算法)

题目链接:http://ac.jobdu.com/problem.php?pid=1459 详解链接:https://github.com/zpfbuaa/JobduInCPlusPlus 参考代码: // // 1459 Prime ring problem.cpp // Jobdu // // Created by PengFei_Zheng on 23/04/2017. // Copyright © 2017 PengFei_Zheng. All rights reserved. // #…

HDOJ 1016 Prime Ring Problem素数环【深搜】

Problem Description A ring is compose of n circles as shown in diagram. Put natural number 1, 2, -, n into each circle separately, and the sum of numbers in two adjacent circles should be a prime. Note: the number of first circle should always be 1.…

hdu1016 Prime Ring Problem【素数环问题（经典dfs）】

Prime Ring Problem Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 74594    Accepted Submission(s): 31690 Problem Description A ring is compose of n circles as shown in diagram. Put natural numb…

Hdu1016 Prime Ring Problem(DFS) 2016-05-06 14:27 329人阅读 评论(0) 收藏

Prime Ring Problem Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 40339    Accepted Submission(s): 17813 Problem Description A ring is compose of n circles as shown in diagram. Put natural num…

hdu1016 Prime Ring Problem(DFS)

Prime Ring Problem Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 66391    Accepted Submission(s): 28456 Problem Description A ring is compose of n circles as shown in diagram. Put natural numb…

HDU1016 Prime Ring Problem（DFS回溯）

Prime Ring Problem Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 34609    Accepted Submission(s): 15327 Problem Description A ring is compose of n circles as shown in diagram. Put natural numb…

Prime is problem - 素数环问题

题目描述: A ring is compose of n circles as shown in diagram. Put natural number 1, 2, ..., n into each circle separately, and the sum of numbers in two adjacent circles should be a prime.Note: the number of first circle should always be 1. 输入: n (1 < n…

HDU1016 Prime Ring Problem (回溯 + 剪枝)

本文链接:http://www.cnblogs.com/Ash-ly/p/5398684.html 题意: 给你一个数字N(N <= 20),要求你把这N个数组成一个环,环内的数字不能重复,左右相邻的两个的和是素数.给出最后的答案. 思路: 利用回溯剪枝算法,N个数,每个数有N种状态,枚举这N个状态,枚举过程中剪枝优化. 代码: #include <cstdio> #include <iostream> #include <cstring> #include &l…

hdu1016 Prime Ring Problem

dfs,用全局数组和变量保存并更新当前状态. 答案可以直接在搜索结束时打印,n为奇数时方案数为0. acm.hdu.edu.cn/showproblem.php?pid=1016 #include <cstdio> #include <cstring> using namespace std; ; int n; int ans[maxn], k; ]; ]; void init(){ memset(isprime, , sizeof isprime); isprime[] = is…