combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:46:15: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
46 | while(b.size()<N-1){
| ~~~~~~~~^~~~
combo.cpp:49:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
49 | if(ps==b.size())
| ~~^~~~~~~~~~
combo.cpp:52:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
52 | if(ps==b.size()+1)
| ~~^~~~~~~~~~~~
combo.cpp:55:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
55 | if(ps==b.size()+2)
| ~~^~~~~~~~~~~~
combo.cpp:65:8: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
65 | if(num==b.size()+1){
| ~~~^~~~~~~~~~~~