foo.cc: In function 'int solve(std::string&, std::string&)':
foo.cc:10:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |         for (int i = 0; i < s.size() - t.size();)
      |                         ~~^~~~~~~~~~~~~~~~~~~~~
foo.cc:13:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |                 while (j < t.size() && s[i + j] == t[j]) j ++;
      |                        ~~^~~~~~~~~~
foo.cc:15:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |                 if (j == t.size()) cnt ++, i += 3;
      |                     ~~^~~~~~~~~~~

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