用stack保存数字,set判重.dfs一遍就好.(或者编码成int,快排+unique #include<cstdio> #include<iostream> #include<string> #include<cstring> #include<queue> #include<vector> #include<stack> #include<vector> #include<map> #incl…

Hopscotch Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 2774 Accepted: 1940 Description The cows play the child's game of hopscotch in a non-traditional way. Instead of a linear set of numbered boxes into which to hop, the cows create a…

The cows play the child's game of hopscotch in a non-traditional way. Instead of a linear set of numbered boxes into which to hop, the cows create a 5x5 rectilinear grid of digits parallel to the x and y axes.They then adroitly hop onto any digit in…

POJ 3050 题意: 1.5*5的方阵中,随意挑一格,记住这个格子的数字 2.可以上下左右走,走5次,每走一次记录下所走格子的数字 3.经过以上步骤,把所得6个数字连起来,形成一串数字.求共可以形成多少种不同的数字串 思路: 网格大小只有5*5,用穷举法,不会超时. 这里利用了stl中的set容器来防止重复.最终只要输出set的size就是结果. 注意dfs回溯时的编程规范 #include<iostream> #include<algorithm> #include<s…

http://poj.org/problem?id=3050 给定一个5×5矩阵,问选6个数的不同排列总数是多少! 二维的搜索,注意要判重,数据量很小,直接用map就好. #include<cstdio> #include<cstring> #include<string> #include<iostream> #include<map> using namespace std; map<string,int>m; ][],ans;…

http://poj.org/problem?id=3050 题目大意: 在一个5*5的格子中走,每一个格子有个数值,每次能够往上下左右走一格,问走了5次后得到的6个数的序列一共同拥有多少种?(一開始站的位置算一个,能够走回去) 思路: 近期我就是在做水题... 直接DFS就可以..我用map推断序列是否反复的. #include<cstdio> #include<cstring> #include<map> #include<string> #includ…

Hopscotch Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 6761   Accepted: 4354 Description The cows play the child's game of hopscotch in a non-traditional way. Instead of a linear set of numbered boxes into which to hop, the cows creat…

思路: 枚举+搜一下+判个重 ==AC //By SiriusRen #include <set> #include <cstdio> using namespace std; int a[8][8],xx[]={1,-1,0,0},yy[]={0,0,1,-1}; set<int>s; bool check(int x,int y){ return x>0&&x<6&&y>0&&y<6; } vo…

POJ.3172 Scales (DFS) 题意分析 一开始没看数据范围,上来直接01背包写的.RE后看数据范围吓死了.然后写了个2^1000的DFS,妥妥的T. 后来想到了预处理前缀和的方法.细节以注释的方式给出. 代码总览 #include <iostream> #include <cstdio> #include <algorithm> #include <cstring> #include <sstream> #include <s…

Hopscotch Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 2845   Accepted: 1995 Description The cows play the child's game of hopscotch in a non-traditional way. Instead of a linear set of numbered boxes into which to hop, the cows creat…