/in/foo.cc: In function 'void zla::Solve()':
/in/foo.cc:145:34: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare]
  145 |                 if (t.size() + 1 <= mx) {
      |                     ~~~~~~~~~~~~~^~~~~