combo.cpp: In function 'std::string guess_sequence(long long int)':
combo.cpp:18:12: error: 'press' was not declared in this scope
18 | int q1=press("AB");
| ^~~~~
combo.cpp:58:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
58 | if (res==ans.size()) ans+=init[2];
| ~~~^~~~~~~~~~~~
combo.cpp:59:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
59 | else if(res==ans.size()+1) ans+=init[0];
| ~~~^~~~~~~~~~~~~~
combo.cpp:70:12: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
70 | if (res==ans.size()) ans+=init[2];
| ~~~^~~~~~~~~~~~
combo.cpp:75:16: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
75 | if (res==ans.size()) ans+=init[1];
| ~~~^~~~~~~~~~~~