combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:53:24: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
53 | while(start.size() != N) {
| ~~~~~~~~~~~~~^~~~
combo.cpp:55:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
55 | if(res == start.size()) {
| ~~~~^~~~~~~~~~~~~~~
combo.cpp:57:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
57 | } else if(res == start.size() + 2) {
| ~~~~^~~~~~~~~~~~~~~~~~~
combo.cpp:61:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
61 | if(res == start.size()) {
| ~~~~^~~~~~~~~~~~~~~
combo.cpp:63:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
63 | } else if(res == start.size() + 2) {
| ~~~~^~~~~~~~~~~~~~~~~~~