/in/foo.cc: In function 'bool check(std::__cxx11::string, std::__cxx11::string)':
/in/foo.cc:12:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<s.size();i++)
               ~^~~~~~~~~
/in/foo.cc:17:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(cnt+1==s.size()||cnt==s.size())
      ~~~~~^~~~~~~~~~
/in/foo.cc:17:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(cnt+1==s.size()||cnt==s.size())
                       ~~~^~~~~~~~~~
/in/foo.cc:24:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<s1.size();i++)
               ~^~~~~~~~~~
/in/foo.cc:32:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(cnt==s.size())
      ~~~^~~~~~~~~~
/in/foo.cc:40:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0;i<s1.size();i++)
               ~^~~~~~~~~~
/in/foo.cc:48:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(cnt==s.size())
      ~~~^~~~~~~~~~