UVALive 4763

一开始，没敢写，感觉会超时。。。其实就是暴力搜索。DFS

  1 #include<iostream>
  2 #include<stdio.h>
  3 #include<string.h>
  4 #include<cmath>
  5 #include<algorithm>
  6 #include<queue>
  7 #define clc(a,b) memset(a,b,sizeof(a))
  8 #define N 100
  9 #define eps 1e-6
 10 #include<stack>
 11 #include<deque>
 12 #include<vector>
 13 using namespace std;
 14 const int  MAXD = 1e5+10;
 15 const int  MAXM = 51;
 16 const int  INF = 0x3f3f3f3f;
 17 typedef long long ll;
 18
 19 char G[10][10];
 20 int  row[10][10],coloum[10][10],cr[10][10],row1[26];
 21 int t;
 22 int sum;
 23 void dfs(int x,int y)
 24 {
 25     if(x==9)
 26     {
 27         sum++;
 28         return;
 29     }
 30     if(G[x][y]>=‘1‘&&G[x][y]<=‘9‘)
 31     {
 32         if(y==8)
 33             dfs(x+1,0);
 34         else
 35             dfs(x,y+1);
 36         return ;
 37     }
 38     else if(G[x][y]==‘e‘)
 39     {
 40         int flag=0;
 41         for(int i=2; i<10; i=i+2)
 42         {
 43             if(!row[x][i]&&!coloum[y][i]&&!cr[(x/3)*3+y/3+1][i])
 44             {
 45                 flag=1;
 46                 G[x][y]=i+‘0‘;
 47                 row[x][i]=1;
 48                 coloum[y][i]=1;
 49                 cr[(x/3)*3+y/3+1][i]=1;
 50                 if(y==8)
 51                     dfs(x+1,0);
 52                 else
 53                     dfs(x,y+1);
 54                 G[x][y]=‘e‘;
 55                 row[x][i]=0;
 56                 coloum[y][i]=0;
 57                 cr[(x/3)*3+y/3+1][i]=0;
 58             }
 59         }
 60         if(!flag)
 61             return;
 62     }
 63     else if(G[x][y]==‘o‘)
 64     {
 65         int flag=0;
 66         for(int i=1; i<=9; i=i+2)
 67         {
 68             if(!row[x][i]&&!coloum[y][i]&&!cr[(x/3)*3+y/3+1][i])
 69             {
 70                 flag=1;
 71                 G[x][y]=i+‘0‘;
 72                 row[x][i]=1;
 73                 coloum[y][i]=1;
 74                 cr[(x/3)*3+y/3+1][i]=1;
 75                 if(y==8)
 76                     dfs(x+1,0);
 77                 else
 78                     dfs(x,y+1);
 79                 G[x][y]=‘o‘;
 80                 row[x][i]=0;
 81                 coloum[y][i]=0;
 82                 cr[(x/3)*3+y/3+1][i]=0;
 83             }
 84         }
 85         if(!flag)
 86             return ;
 87     }
 88     else if(G[x][y]>=‘a‘&&G[x][y]<=‘z‘&&G[x][y]!=‘e‘&&G[x][y]!=‘o‘)
 89     {
 90         int num=G[x][y]-‘a‘;
 91         if(row1[num])
 92         {
 93             if(!row[x][row1[num]]&&!coloum[y][row1[num]]&&!cr[(x/3)*3+y/3+1][row1[num]])
 94             {
 95                 G[x][y]=row1[num]+‘0‘;
 96                 row[x][row1[num]]=1;
 97                 coloum[y][row1[num]]=1;
 98                 cr[(x/3)*3+y/3+1][row1[num]]=1;
 99                 if(y==8)
100                     dfs(x+1,0);
101                 else
102                     dfs(x,y+1);
103                 G[x][y]=num+‘a‘;
104                 row[x][row1[num]]=0;
105                 coloum[y][row1[num]]=0;
106                 cr[(x/3)*3+y/3+1][row1[num]]=0;
107             }
108             else
109                 return ;
110         }
111         else
112         {
113             int flag=0;
114             for(int i=1; i<=9; i++)
115             {
116                 if(row[x][i]==0&&coloum[y][i]==0&&cr[(x/3)*3+y/3+1][i]==0)
117                 {
118                     flag=1;
119                     row1[num]=i;
120                     G[x][y]=i+‘0‘;
121                     row[x][i]=1;
122                     coloum[y][i]=1;
123                     cr[(x/3)*3+y/3+1][i]=1;
124                     if(y==8)
125                         dfs(x+1,0);
126                     else
127                         dfs(x,y+1);
128                     G[x][y]=num+‘a‘;
129                     row1[num]=0;
130                     row[x][i]=0;
131                     coloum[y][i]=0;
132                     cr[(x/3)*3+y/3+1][i]=0;
133                 }
134             }
135             if(flag==0)
136                 return ;
137         }
138     }
139     else if(G[x][y]==‘0‘)
140     {
141         int flag=0;
142         for(int i=1; i<=9; i++)
143         {
144             if(!row[x][i]&&!coloum[y][i]&&cr[(x/3)*3+y/3+1][i]==0)
145             {
146                 flag=1;
147                 G[x][y]=i+‘0‘;
148                 row[x][i]=1;
149                 coloum[y][i]=1;
150                 cr[(x/3)*3+y/3+1][i]=1;
151                 if(y==8)
152                     dfs(x+1,0);
153                 else
154                     dfs(x,y+1);
155                 G[x][y]=‘0‘;
156                 row[x][i]=0;
157                 coloum[y][i]=0;
158                 cr[(x/3)*3+y/3+1][i]=0;
159             }
160         }
161         if(flag==0)
162             return;
163     }
164 }
165
166 int main()
167 {
168     //freopen("in.txt","r",stdin);
169     scanf("%d",&t);
170     while(t--)
171     {
172         sum=0;
173         clc(row,0);
174         clc(coloum,0);
175         clc(cr,0);
176         clc(row1,0);
177         for(int i=0;i<9;i++)
178         {
179             scanf("%s",G[i]);
180         }
181         for(int i=0; i<9; i++)
182         {
183             for(int j=0; j<9; j++)
184             {
185
186                 if(G[i][j]>=‘1‘&&G[i][j]<=‘9‘)
187                 {
188                     row[i][G[i][j]-‘0‘]=1;
189                     coloum[j][G[i][j]-‘0‘]=1;
190                     cr[(i/3)*3+j/3+1][G[i][j]-‘0‘]=1;
191                 }
192             }
193         }
194         dfs(0,0);
195         printf("%d\n",sum);
196     }
197     return 0;
198 }