combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:47:27: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
47 | while ( prefix.length() < N ) {
| ~~~~~~~~~~~~~~~~^~~
combo.cpp:60:45: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
60 | while( s.length() + append.length()+1 <= N*4 ) {
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~
combo.cpp:67:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
67 | if ( n > prefix.length()) {
| ~~^~~~~~~~~~~~~~~~~
combo.cpp:71:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
71 | if ( n > prefix.length()) {
| ~~^~~~~~~~~~~~~~~~~