/in/foo.cc: In function 'int main()':
/in/foo.cc:257:37: warning: narrowing conversion of 'get_h(s0)' from 'int' to 'double' inside { } [-Wnarrowing]
  open[++tail]=(struct node){s0,get_h(s0)};
                                ~~~~~^~~~
/in/foo.cc:254:6: warning: unused variable 'beginning' [-Wunused-variable]
  int beginning=time(0);
      ^~~~~~~~~