foo.cc: In function 'void dfs(int, int)':
foo.cc:15:36: warning: suggest parentheses around comparison in operand of '|' [-Wparentheses]
   15 |     if (x<1||x>m||y<1||y>n||a[x][y]=='#'|b[x][y]==false) return;//判断是否越界
      |                             ~~~~~~~^~~~~
foo.cc: In function 'int main()':
foo.cc:35:8: warning: 'q' may be used uninitialized in this function [-Wmaybe-uninitialized]
   35 |     dfs(p,q);//深搜
      |     ~~~^~~~~
foo.cc:35:8: warning: 'p' may be used uninitialized in this function [-Wmaybe-uninitialized]

Found 3 testcases.
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