combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:6:21: 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(ans.size()!=n){
| ~~~~~~~~~~^~~
combo.cpp:8:28: 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(ans+c)==ans.size()+1){
| ~~~~~~~~~~~~^~~~~~~~~~~~~~