1 ---- /!\ '''Edit conflict - your version:''' ----
   2 === 小节标题1 ===
   3 {{{
   4 #!cplusplus
   5 
   6 
   7 ---- /!\ '''End of edit conflict''' ----
   8 #include <stdio.h>
   9 #include <string.h>
  10 #include <stdlib.h>
  11 
  12 #define TPS 4
  13 
  14 #define STEP                  \
  15  do {                         \
  16    tt =1;                     \
  17    for(; d<TPS; d++)            \
  18    {                          \
  19        tr=r+tp[d][0], tc=c+tp[d][1];         \
  20        if (tr>=0 && tr <n && tc>=0 && tc <m && p[tr][tc]=='.')    \
  21          {  r = tr, c = tc;   \
  22             p[r][c] = '0'+d;    \
  23             st[t] = d;        \
  24             t++, s++;         \
  25             tt  = 0;           \   
  26             break;             \
  27          }                     \                
  28    }                           \
  29 } while(0)
  30      
  31      
  32 #define  OMAX  25
  33 
  34 void printp(int n, int m, char **p)
  35 {
  36   int i, j;
  37   fprintf(stdout, "\n");
  38   for(i=0; i<n; i++)
  39   {
  40     for(j=0; j<m; j++)
  41       fprintf(stdout, "%c", p[i][j]);
  42     fprintf(stdout, "\n");
  43   }
  44 }
  45 
  46 int count(int n, int m, char **p)
  47 {
  48   int st[OMAX*OMAX];
  49   int s, d;
  50   int tt;
  51   signed int t;
  52   signed int r, c, tr, tc;
  53   int tp[TPS][2] = { {+1, 0}, {-1, 0}, {0, +1}, {0, -1} };
  54   //printp(n,m,p);
  55   for(r=0; r<n; r++)
  56     {
  57       for(c=0; c<m; c++)
  58         if(p[r][c]=='@')
  59           break;
  60       if(p[r][c]=='@')
  61         break;
  62     }
  63   for(s=1, st[0]=TPS, t=1; t>0;)
  64     {
  65       d=0;
  66       STEP;
  67       //fprintf(stderr, "(%d, %d)\t", r, c);
  68       //printp(n,m,p);
  69 
  70       while (t>0 && tt == 1) 
  71         {
  72           t--;
  73           d = st[t];
  74           r -= tp[d][0];
  75           c -= tp[d][1];
  76           d++;
  77           STEP;
  78           //fprintf(stderr, "(%d, %d)\t", r, c);
  79         }
  80     }
  81   return s;
  82 }
  83 
  84 int pp(char **p)
  85 {
  86   int n, m;
  87   int i;
  88   fscanf(stdin, "%d%d", &m, &n);
  89   for(i=0; i<n ;i++)
  90     fscanf(stdin,"%s", p[i]);
  91 
  92   if(n==0 || m==0)
  93     return 0;
  94   else
  95     return count(n, m, p);
  96 }
  97 
  98 int main()
  99 {
 100   int i;
 101   char **p;
 102   p = (char **)malloc(sizeof(char*)*OMAX);
 103   for(i=0; i< OMAX; i++)
 104     p[i]=(char *)malloc(sizeof(char)*OMAX);
 105   do
 106     {
 107       i=pp(p);
 108       if(i!=0)
 109         fprintf(stdout, "%d\n", i);
 110     }
 111   while(i!=0);
 112 
 113   return 0;
 114 }
 115 
 116 
 117 
 118 ---- /!\ '''Edit conflict - other version:''' ----
 119 
 120 ---- /!\ '''Edit conflict - your version:''' ----
 121 
 122 ---- /!\ '''End of edit conflict''' ----