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  1. #include<stdio.h>
  2. #include<string.h>
  3. #include<stdlib.h>
  4. #define MM 30
  5.  
  6. char matrix[MM][MM];
  7. int vis[MM][MM];
  8. int ret,row,col;
  9.  
  10. int inx[4]={0,-1,0,1};  //right,up,left,down
  11. int iny[4]={1,0,-1,0};
  12.  
  13. void set()
  14. {
  15.     memset(matrix,0,sizeof(matrix));
  16.     memset(vis,0,sizeof(vis));
  17. }
  18.  
  19. void dfs(int x,int y)
  20. {
  21.     int i,j,k;
  22.     for(k=0;k<4;k++)
  23.     {
  24.         i=x+inx[k];
  25.         j=y+iny[k];
  26.         if(i>=0 && i<row && j>=0 && j<col && matrix[i][j]=='X' && !vis[i][j])
  27.         {
  28.             vis[i][j]=1;
  29.  
  30.         }
  31.         else if(i>=0 && i<row && j>=0 && j<col && matrix[i][j]=='O' && !vis[i][j])
  32.         {
  33.             if(k==0)
  34.             {
  35.                 if(matrix[i][j+1]=='.' && i>=0 && i<row && j+1>=0 && j+1<col && !vis[i][j+1])
  36.                 {
  37.                     matrix[i][j]='.';
  38.                     matrix[i][j+1]='O';
  39.                     vis[i][j]=1;
  40.                     dfs(i,j);
  41.                 }
  42.  
  43.             }
  44.             else if(k==1)
  45.             {
  46.                 if(matrix[i-1][j]=='.' && i-1>=0 && i-1<row && j>=0 && j<col && !vis[i-1][j])
  47.                 {
  48.                     matrix[i][j]='.';
  49.                     matrix[i-1][j]='O';
  50.                     vis[i][j]=1;
  51.                     dfs(i,j);
  52.                 }
  53.  
  54.             }
  55.             else if(k==2)
  56.             {
  57.                 if(matrix[i][j-1]=='.' && i>=0 && i<row && j-1>=0 && j-1<col && !vis[i][j-1])
  58.                 {
  59.                     matrix[i][j]='.';
  60.                     matrix[i][j-1]='O';
  61.                     vis[i][j]=1;
  62.                     dfs(i,j);
  63.                 }
  64.  
  65.             }
  66.             else if(k==3)
  67.             {
  68.                 if(matrix[i+1][j]=='.' && i+1>=0 && i+1<row && j>=0 && j<col && !vis[i+1][j])
  69.                 {
  70.                     matrix[i][j]='.';
  71.                     matrix[i+1][j]='O';
  72.                     vis[i][j]=1;
  73.                     dfs(i,j);
  74.                 }
  75.  
  76.             }
  77.         }
  78.         else if(i>=0 && i<row && j>=0 && j<col && matrix[i][j]=='C' && !vis[i][j])
  79.         {
  80.             ret++;
  81.             matrix[i][j]='.';
  82.             vis[i][j]=1;
  83.             dfs(i,j);
  84.         }
  85.         else if(i>=0 && i<row && j>=0 && j<col && matrix[i][j]=='.' && !vis[i][j])
  86.         {
  87.             vis[i][j]=1;
  88.             dfs(i,j);
  89.         }
  90.     }
  91. }
  92.  
  93. int main()
  94. {
  95.     int test,t;
  96.     int i,j,flag;
  97.     scanf("%d",&test);
  98.     for(t=0;t<test;t++)
  99.     {
  100.         scanf("%d%d",&row,&col);
  101.         set();
  102.         for(i=0;i<row;i++)
  103.         {
  104.             scanf("%s",matrix[i]);
  105.         }
  106.         flag=0;
  107.         for(i=0;i<row;i++)
  108.         {
  109.             for(j=0;j<col;j++)
  110.             {
  111.                 if(matrix[i][j]=='S')
  112.                 {
  113.                     ret=0;
  114.                     flag=1;
  115.                     matrix[i][j]='.';
  116.                     vis[i][j]=1;
  117.                     dfs(i,j);
  118.                     break;
  119.                 }
  120.             }
  121.             if(flag) break;
  122.         }
  123.         printf("%d\n",ret);
  124.     }
  125.     return 0;
  126. }
  127.  
Success #stdin #stdout 0.02s 1728KB
comments (?)
stdin 
3
3 4
S.OC
..O.
.XCX
4 6
S.X.CC
..XOCC
...O.C
....XC
4 4
.SXC
OO.C
..XX
.CCC
stdout 
1
6
3
https://ideone.com/pCm7M0
language:
C (gcc 8.3)
created:
12 years ago
visibility:
public

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