/in/foo.cc: In function 'int bfs(Point, int, int)':
/in/foo.cc:41:7: warning: unused variable 'c' [-Wunused-variable]
   int c = 0;
       ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:64:6: warning: variable 'p' set but not used [-Wunused-but-set-variable]
  int p, q;
      ^
/in/foo.cc:64:9: warning: variable 'q' set but not used [-Wunused-but-set-variable]
  int p, q;
         ^