combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:34:14: 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 (c==ans.size()+2){
| ~^~~~~~~~~~~~~~
combo.cpp:36:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
36 | } else if (c==ans.size()+1){
| ~^~~~~~~~~~~~~~
combo.cpp:38:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
38 | } else if (c==ans.size()){
| ~^~~~~~~~~~~~
combo.cpp:45:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
45 | if (press(ans+use[0])==ans.size()+1){
| ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~
combo.cpp:48:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
48 | if (press(ans+use[1])==ans.size()+1){
| ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~