/in/foo.cc: In function 'int solve(std::__cxx11::string&, std::__cxx11::string&)':
/in/foo.cc:10:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < s.size() - t.size();)
                  ~~^~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:15:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if (j == t.size()) cnt ++, i += 3;
       ~~^~~~~~~~~~~