/in/foo.cc: In function 'int main()':
/in/foo.cc:22:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<ss.length();i++)
              ~^~~~~~~~~~~~
/in/foo.cc:27:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<s.length();i++)
              ~^~~~~~~~~~~
/in/foo.cc:30:4: error: expected ')' before 'continue'
    continue;
    ^~~~~~~~