/in/foo.cc: In function 'void search_DFS(std::__cxx11::string)':
/in/foo.cc:37:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(ans&&j+xtzm==x.size())
             ~~~~~~^~~~~~~~~~
/in/foo.cc:39:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(ans&&j+xtzm!=x.size())
             ~~~~~~^~~~~~~~~~
/in/foo.cc:44:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if(!ans&&sum.size()>maxn)
           ~~~~~~~~~~^~~~~
/in/foo.cc:27:8: warning: 'xtzm' may be used uninitialized in this function [-Wmaybe-uninitialized]
    int xtzm;
        ^~~~