combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:24:20: 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]
24 | if (rez==s.size()) s.push_back('B');
| ~~~^~~~~~~~~~
combo.cpp:25:25: 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]
25 | else if (rez==s.size()+1) s.push_back('Y');
| ~~~^~~~~~~~~~~~
combo.cpp:31:20: 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]
31 | if (rez==s.size()) s.push_back('B');
| ~~~^~~~~~~~~~
combo.cpp:32:25: 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]
32 | else if (rez==s.size()+1) s.push_back('X');
| ~~~^~~~~~~~~~~~
combo.cpp:38:20: 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]
38 | if (rez==s.size()) s.push_back('B');
| ~~~^~~~~~~~~~
combo.cpp:39:25: 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]
39 | else if (rez==s.size()+1) s.push_back('X');
| ~~~^~~~~~~~~~~~
combo.cpp:45:20: 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]
45 | if (rez==s.size()) s.push_back('A');
| ~~~^~~~~~~~~~
combo.cpp:46:25: 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]
46 | else if (rez==s.size()+1) s.push_back('X');
| ~~~^~~~~~~~~~~~