combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:34:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
34 | if (val == ans.size()) ans += s[2];
| ~~~~^~~~~~~~~~~~~
combo.cpp:35:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
35 | else if (val == ans.size() + 1) ans += s[0];
| ~~~~^~~~~~~~~~~~~~~~~
combo.cpp:41:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
41 | if (ask(ans) == ans.size()) break;
| ~~~~~~~~~^~~~~~~~~~~~~
combo.cpp:44:20: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
44 | if (ans.size() != n) ans += s[2];
| ~~~~~~~~~~~^~~~