标签:hdu 5012 dice bfs there are 2 special dices on the table.
其实是很水的一道bfs,用字符串表示每个状态,map判重就ok了。
题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5012
#include<iostream> #include<cstdio> #include<cstring> #include<cmath> #include<cctype> #include<algorithm> #include<string> #include<queue> #include<map> #define N 7 using namespace std; string a,b; map<string,int> Hash; struct node { int t; string v; }; int rot[4][7]={ //Rotation operation {0,4,3,1,2,5,6}, //left {0,3,4,2,1,5,6}, //right {0,6,5,3,4,1,2}, //front {0,5,6,3,4,2,1}, //back }; int bfs() { queue<node> q; node u,v; u.t=0; u.v=b; q.push(u); Hash[b]=1; while(!q.empty()) { u=q.front(); q.pop(); if(u.v==a) return u.t; for(int i=0;i<4;i++) { v.v=""; for(int j=1;j<7;j++) v.v+=u.v[rot[i][j]-1]; //~~ if(!Hash[v.v]) { v.t=u.t+1; q.push(v); Hash[v.v]=1; } } } return -1; } int main() { string t; while(cin>>t) { a=b=""; a+=t; for(int i=2;i<=6;i++) { cin>>t; a+=t; } for(int j=1;j<=6;j++) { cin>>t; b+=t; } Hash.clear(); cout<<bfs()<<endl; } return 0; }
标签:hdu 5012 dice bfs there are 2 special dices on the table.
原文地址:http://blog.csdn.net/darwin_/article/details/39349707