UVA10085-不知错在何处

Posted 2021-03-13 savennist

  1 #include<cstdio>
  2 #include<cstring>
  3 #include<iostream>
  4 #include<algorithm>
  5 #include<map>
  6 #include<queue>
  7 #include<string>
  8 using namespace std;
  9 typedef struct state STA;
 10 struct state
 11 {
 12     int st[3][3];
 13     int stnum;
 14     int step;
 15     string way;
 16     bool operator< (const state p)const
 17     {
 18         return this->step<p.step;
 19     }
 20 };
 21 
 22 const int dx[]={1,-1,0,0};
 23 const int dy[]={0,0,1,-1};
 24 const char Wy[]={‘D‘,‘U‘,‘R‘,‘L‘};
 25 
 26 int ans[3][3];
 27 string answay;
 28 int ans_step;
 29 
 30 map<int,bool> cyc;
 31 queue<STA> psd;
 32 
 33 int bfs(STA start)
 34 {
 35     int nowstep=start.step;
 36     int nowstate=start.stnum;
 37     int nowst[3][3];
 38     memcpy(nowst,start.st,sizeof(start.st));
 39     string noway=start.way;
 40     while(1)
 41     {
 42         cyc[nowstate]=true;
 43         //cout<<noway<<endl;
 44         if(nowstep>ans_step)
 45         {
 46             ans_step=nowstep;
 47             memcpy(ans,nowst,sizeof(nowst));
 48             answay=noway;
 49         }
 50         int x,y; int ok=0;
 51         for(x=0;x<3;++x)
 52         {
 53             for(y=0;y<3;++y)
 54                 if(nowst[x][y]==0){ok=1;break;}
 55             if(ok)break;
 56         }
 57         //
 58         STA m;
 59         for(int i=0;i<4;++i)
 60         {
 61             int newx=x+dx[i];
 62             int newy=y+dy[i];
 63             ok=(newx>=0&&newx<3&&newy>=0&&newy<3);
 64             if(!ok)continue;
 65             memcpy(m.st,nowst,sizeof(m.st));
 66             m.st[x][y]=nowst[newx][newy];
 67             m.st[newx][newy]=0;
 68             m.stnum=0;
 69             for(int k=0;k<3;++k)
 70                 for(int j=0;j<3;++j)
 71                     m.stnum=m.stnum*10+m.st[k][j];
 72             if(cyc[m.stnum]==true)continue;
 73             m.step=nowstep+1;
 74             //m.way=noway.append(1,Wy[i]);
 75             m.way=noway;
 76             (m.way).append(1,Wy[i]);
 77             psd.push(m);
 78         }
 79         if(psd.empty())break;
 80         m=psd.front();psd.pop();
 81         //
 82         nowstep=m.step;
 83         nowstate=m.stnum;
 84         memcpy(nowst,m.st,sizeof(m.st));//st[][]
 85         noway=m.way;//string
 86     }
 87     return 0;
 88 }
 89 
 90 int main()
 91 {
 92     freopen("input.txt","r",stdin);
 93     freopen("ans.txt","w",stdout);
 94     int n;
 95     scanf("%d",&n);
 96     for(int c=1;c<=n;c++)
 97     {
 98         ans_step=0;
 99         cyc.clear();
100         //
101         STA m;
102         m.way="";
103         m.step=0;
104         int sum=0;
105         for(int i=0;i<3;++i)
106         {
107             for(int k=0;k<3;++k)
108             {
109                 scanf("%d",&m.st[i][k]);
110                 sum=sum*10+m.st[i][k];
111             }
112         }
113         m.stnum=sum;
114         //
115         bfs(m);
116         //
117         printf("Puzzle #%d
",c);
118         for(int i=0;i<3;++i)
119             printf("%d %d %d
",ans[i][0],ans[i][1],ans[i][2]);
120         cout<<answay<<"
"<<endl;
121     }
122     return 0;
123 }

下面是Udebug提供的查错：

样例：

9

0 1 2
3 4 5
6 7 8

1 0 2
3 4 5
6 7 8

1 2 0
3 4 5
6 7 8

1 2 3
0 4 5
6 7 8

1 2 3
4 0 5
6 7 8

1 2 3
4 5 0
6 7 8

1 2 3
4 5 6
0 7 8

1 2 3
4 5 6
7 0 8

1 2 3
4 5 6
7 8 0

我的结果：

Puzzle #1
8 0 6
5 4 7
2 3 1
DDRUURDLLDRRULLURRDLDLUURDDLUUR

Puzzle #2
0 8 6
7 4 3
2 5 1
DDRUULLDDRURULLDDRURULLDDRRUULL

Puzzle #3
8 7 6
2 4 0
5 3 1
DDLUURDDLLUURDLURRDDLURDLLUURRD

Puzzle #4
8 7 6
3 4 2
0 5 1
DRUULDDRRUULDRULLDDRULDRRUULLDD

Puzzle #5
8 4 6
1 0 7
3 2 5
DRUULDDRUULDDRULLDRULURDDRUULD

Puzzle #6
8 7 6
2 5 1
3 4 0
DLUURDDLLUURDLURRDDLURDLLUURRDD

Puzzle #7
8 4 7
6 5 2
3 0 1
UURDDRULLURRDLLDRRULULDDRUULDDR

Puzzle #8
8 6 7
2 5 4
0 3 1
UURDDLLUURDRDLLUURDRDLLUURRDDLL

Puzzle #9
6 4 7
8 5 0
3 2 1
UULDDRUULLDDRULDRRUULDRULLDDRRU

正确答案：

Puzzle #1
8 7 6
0 4 1
2 5 3
DDRUULDDRRUULDRULLDDRULDRRUULLD

Puzzle #2
8 6 0
5 4 7
2 3 1
DDRULLURRDLLDRRULULDDRUULDDRRUU

Puzzle #3
8 0 6
7 4 3
2 5 1
DDLUULDRRDLLURRULLDRDRUULDDRUUL

Puzzle #4
8 7 6
3 4 2
0 5 1
URDRDLULDRUURDDLULURRDLLURRDLDL

Puzzle #5
8 6 0
5 2 7
3 4 1
DRULLURRDLLDRRULULDDRUULDDRRUU

Puzzle #6
8 7 6
2 5 1
3 4 0
ULDRDLULDRUURDDLULURRDLLURRDLDR

Puzzle #7
8 6 4
0 5 7
3 2 1
UURDDLUURRDDLURDLLUURDLURRDDLLU

Puzzle #8
8 4 7
6 5 2
3 1 0
UURDLLDRRULLURRDLDLUURDDLUURRDD

Puzzle #9
8 6 7
2 5 4
3 0 1
UULDDLURRULLDRRDLLURURDDLUURDDL