类似八皇后,暴力深搜. 其实我觉得这题目叙述不是很好,如果答案为0呢,难道不输出? AC代码: #include<cstdio> #include<cstring> #include<algorithm> using namespace std; const int maxn=11; int vis[maxn],d[maxn][maxn]; int ans; int n; int dfs(int sum,int cur){ if(cur==n) return sum;…

HDOJ(HDU).1016 Prime Ring Problem (DFS) [从零开始DFS(3)] 从零开始DFS HDOJ.1342 Lotto [从零开始DFS(0)] - DFS思想与框架/双重DFS HDOJ.1010 Tempter of the Bone [从零开始DFS(1)] -DFS四向搜索/奇偶剪枝 HDOJ(HDU).1015 Safecracker [从零开始DFS(2)] -DFS四向搜索变种 HDOJ(HDU).1016 Prime Ring Problem (…

Data Structure Problem Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.uestc.edu.cn/#/problem/show/483 Description Data structure is a fundamental course of Computer Science, so that each contestant is highly likely to solve this data structu…

Prime Ring Problem Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 31031    Accepted Submission(s): 13755 Problem Description A ring is compose of n circles as shown in diagram. Put natural numb…

A very hard Aoshu problem Problem Description Aoshu is very popular among primary school students. It is mathematics, but much harder than ordinary mathematics for primary school students. Teacher Liu is an Aoshu teacher. He just comes out with a pro…

题目连接:http://acm.hdu.edu.cn/showproblem.php?pid=4403 A very hard Aoshu problem Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1080    Accepted Submission(s): 742 Problem Description Aoshu is ver…

题目连接:http://acm.hdu.edu.cn/showproblem.php?pid=1016 Prime Ring Problem Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 34554    Accepted Submission(s): 15303 Problem Description A ring is compos…

CF291E 题意:一棵树,每条边上有一些字符,求目标串出现了多少次 直接求目标串的fail然后一边dfs一边跑kmp 然后就被特殊数据卡到\(O(n^2)\)了... 因为这样kmp复杂度分析的基础就没有了,now指针可能每个孩子都减少n次 所以怒加trie图优化 貌似有人写了倍增+哈希的做法........ #include <iostream> #include <cstdio> #include <cstring> #include <algorithm&…

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…

Annoying problem 题目连接: http://acm.hdu.edu.cn/showproblem.php?pid=5296 Description Coco has a tree, whose nodes are conveniently labeled by 1,2,-,n, which has n-1 edge,each edge has a weight. An existing set S is initially empty. Now there are two kin…