combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:6:19: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
6 | while(S.length()<N){
| ~~~~~~~~~~^~
combo.cpp:8:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
8 | if(press(S)==S.length()){continue;}
| ~~~~~~~~^~~~~~~~~~~~
combo.cpp:11:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
11 | if(press(S)==S.length()){continue;}
| ~~~~~~~~^~~~~~~~~~~~
combo.cpp:14:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
14 | if(press(S)==S.length()){continue;}
| ~~~~~~~~^~~~~~~~~~~~
combo.cpp:17:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
17 | if(press(S)==S.length()){continue;}
| ~~~~~~~~^~~~~~~~~~~~