combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:42:21: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
42 | while (s.size() < N - 1)
| ~~~~~~~~~^~~~~~~
combo.cpp:58:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
58 | if (x == s.size())
| ~~^~~~~~~~~~~
combo.cpp:62:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
62 | if (x == s.size() + 1)
| ~~^~~~~~~~~~~~~~~
combo.cpp:66:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
66 | if (x == s.size() + 2)
| ~~^~~~~~~~~~~~~~~