/in/foo.cc: In function 'int judge(std::__cxx11::string)':
/in/foo.cc:6:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<s.length();i++)if(s[i]=='.'&&i==s.length()-2)return 1;else if(s[i]=='.')return 0;
              ~^~~~~~~~~~~
/in/foo.cc:6:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<s.length();i++)if(s[i]=='.'&&i==s.length()-2)return 1;else if(s[i]=='.')return 0;
                                             ~^~~~~~~~~~~~~~
/in/foo.cc: In function 'std::__cxx11::string getzero(std::__cxx11::string)':
/in/foo.cc:12:6: warning: unused variable 'jug' [-Wunused-variable]
  int jug=0,link=0;
      ^~~
/in/foo.cc: In function 'std::__cxx11::string changing(std::__cxx11::string)':
/in/foo.cc:51:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<s.length();i++)
              ~^~~~~~~~~~~
/in/foo.cc:60:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<=s.length();i++)
              ~^~~~~~~~~~~~
/in/foo.cc:49:6: warning: variable 'link' set but not used [-Wunused-but-set-variable]
  int link=0;
      ^~~~
/in/foo.cc: In function 'std::__cxx11::string sishewuru(std::__cxx11::string)':
/in/foo.cc:97:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<s.length()-1;i++)res+=s[i];
              ~^~~~~~~~~~~~~