/in/foo.cc: In function 'void search_DFS(std::__cxx11::string)':
/in/foo.cc:32:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(ans&&((j+xtzm)==x.size()))
              ~~~~~~~~^~~~~~~~~~
/in/foo.cc:34:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if(ans&&((j+xtzm)!=x.size()))
              ~~~~~~~~^~~~~~~~~~
/in/foo.cc:49:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if(!ans&&sum.size()>maxn)
           ~~~~~~~~~~^~~~~