刷回溯的时候发现我对DFS思路很不清晰,总是做着做着就乱了,刷个水题找找思路. 题意:经典DFS,找出所有的能让1~n的数形成素数环的序列(相邻相加为素数): #include <iostream> #include <cmath> #include <cstdio> #include <cstring> #include <cstdlib> #include <string> #include <sstream> #in…

Prime Ring Problem Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 55053    Accepted Submission(s): 24366 Problem Description A ring is compose of n circles as shown in diagram. Put natural numb…

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 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…

http://acm.hdu.edu.cn/showproblem.php?pid=1016 Sample Input 6 8   Sample Output Case 1: 1 4 3 2 5 6 1 6 5 2 3 4 Case 2: 1 2 3 8 5 6 7 4 1 2 5 8 3 4 7 6 1 4 7 6 5 8 3 2 1 6 7 4 3 8 5 2 题意: 输入整数n (0 < n < 20). 找出n个整数,能组成一个环,环中任意相邻两数之和为素数,字典序输出所有情况,每种情…

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…

题意:一个环,相邻相加是素数. 思路: 直接深搜就好了.. output limit exceed 了好几发... 因为那个while里面的scanf前面的"~" 后来搜了output limit exceed的常见错误,还有输入输出,所以主要看下输入输出那边有没有写错吧,还有写的时候也要及其避免出现错误. #include <bits/stdc++.h> using namespace std; typedef long long LL; typedef unsigned…

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…

Prime Ring Problem Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 40069 Accepted Submission(s): 17675 Problem Description A ring is compose of n circles as shown in diagram. Put natural number 1,…

hdu1015:给定一串可用序列值,每个字符映射到一个1-26之间的整数,选择五个有序数使得满足 a-b2+c3-d4+e5=target. #include<iostream> #include<cstdio> #include<string.h> #include<algorithm> #include<map> using namespace std; int target; ]; ]; map<char,int>mp; ],c…