/in/foo.cc: In function 'bool Find(int)':
/in/foo.cc:32:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<gox[u].size();i++)
              ~^~~~~~~~~~~~~~
/in/foo.cc: In function 'bool readin()':
/in/foo.cc:28:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^