UVa-1343 The Rotation Game 

  1 #include <bits/stdc++.h>
  2 #define _for(i,a,b) for(int i = (a);i < (b);i ++)
  3 
  4 using namespace std;
  5 const int maxn = 25;
  6 const int ra[maxn][maxn] = {{0,2,6,11,15,20,22},{1,3,8,12,17,21,23},
  7                             {10,9,8,7,6,5,4},{19,18,17,16,15,14,13},
  8                             {23,21,17,12,8,3,1},{22,20,15,11,6,2,0},
  9                             {13,14,15,16,17,18,19},{4,5,6,7,8,9,10}};
 10 const int ja[maxn] = {6,7,8,11,12,15,16,17};
 11 int a[maxn];
 12 string rnt;
 13 
 14 int readint() {int tmp;scanf("%d",&tmp);return tmp;}
 15 
 16 int unordered(int tmpa[maxn])
 17 {
 18     int cnt = 0;
 19     _for(i,0,8)
 20         if(tmpa[ja[i]]!=1)
 21             cnt ++;
 22     return cnt;
 23 }
 24 
 25 void init(int ta,int tmpa[maxn])
 26 {
 27     memcpy(tmpa,a,sizeof(a));
 28     _for(i,0,24)
 29         if(tmpa[i]!=ta)
 30             tmpa[i] = 0;
 31         else
 32             tmpa[i] = 1;
 33 }
 34 
 35 int g2i(int tmpa[maxn])
 36 {
 37     int rnt = 0;
 38     for(int i = 23;i >= 0;i --)
 39         if(tmpa[i])
 40             rnt += 1<<(23-i);
 41     return rnt;
 42 }
 43 
 44 void i2g(int I,int tmpa[maxn])
 45 {
 46     memset(tmpa,0,sizeof(int)*maxn);
 47     for(int i = 23;i >= 0;i --)
 48         if((I>>i)&0x1)    tmpa[23-i] = 1;
 49 }
 50 
 51 void rotate(int di,int tmpa[maxn])
 52 {
 53     int t = tmpa[ra[di][0]];
 54     _for(i,1,7)
 55         tmpa[ra[di][i-1]] = tmpa[ra[di][i]];
 56     tmpa[ra[di][6]] = t;
 57 }
 58 
 59 struct cmp
 60 {
 61     bool operator() (const pair<int,string> a,const pair<int,string> b) const
 62     {
 63         int tmpa[maxn];
 64         int tmpb[maxn];
 65         i2g(a.first,tmpa);i2g(b.first,tmpb);
 66         int aa = unordered(tmpa),bb = unordered(tmpb);
 67         if(aa>bb)
 68             return true;
 69         return false;
 70     }
 71 };
 72 
 73 int flag = 0;
 74 string bfs(int ta)
 75 {
 76     int tmpa[maxn];
 77     set<int> vis;
 78     string bs;
 79     init(ta,tmpa);
 80     if(!unordered(tmpa)) {flag = 1;return bs;}
 81     
 82     queue<pair<int,string>> q;
 83     q.push({g2i(tmpa),bs});
 84     while(!q.empty())
 85     {
 86         int g = q.front().first;
 87         string s = q.front().second;
 88         i2g(g,tmpa);
 89         if(!unordered(tmpa)) return s;
 90         q.pop();
 91         _for(i,0,8)
 92         {
 93             i2g(g,tmpa);
 94             rotate(i,tmpa);
 95             
 96             int ttg = g2i(tmpa);
 97             if(!vis.count(ttg))
 98             {
 99                 vis.insert(ttg);
100                 s += i+'A';
101                 q.push({ttg,s});
102                 s.pop_back();
103             }
104         }
105     }
106     return bs;
107 }
108 
109 int solve()
110 {
111     string rnts;
112     rnt.clear();
113     rnt = bfs(1);
114     int nnuumm = 1;
115     _for(i,2,4)
116     {
117         rnts = bfs(i);
118         if(rnts.size()<rnt.size()||rnts.size()==rnt.size()&&rnts<rnt)
119         {
120             rnt = rnts;
121             nnuumm = i;
122         }
123     }
124     return nnuumm;
125 }
126 
127 void print_ans(int ans)
128 {
129     if(flag)
130     {
131         cout<<"No moves needed"<<endl;
132         cout << a[6] << endl;
133         return ;
134     }
135     cout << rnt << endl;
136     cout << ans << endl;
137 }
138 
139 int main()
140 {
141     while(~scanf("%d",&a[0])&&a[0]!=0)
142     {
143         flag = 0;
144         _for(i,1,24)
145             a[i] = readint();
146         int ans = solve();
147         print_ans(ans);
148     }
149     return 0;
150 }

这是一份又臭又长，没有用IDA*所以慢的一塌糊涂就算时间限制再加个0都过不了的BFS无优化代码，放上来纯属个人娱乐，主要具有纪念意义，没有任何参考价值

posted @ 2018-12-06 16:33  Asurudo  阅读(163)  评论(0)  编辑  收藏  举报