Compilare: main.cpp: In function 'void sterge(nod*, std::string, int)': main.cpp:24:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | if(k<str.size()-1) | ~^~~~~~~~~~~~~ main.cpp: In function 'int getpref(nod*, std::string, int, int)': main.cpp:51:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | if(k == str.size()) | ~~^~~~~~~~~~~~~ main.cpp:58:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 58 | if(q->children > 1 || (q->cnt && k != str.size()-1) || (q->children && k == str.size()-1)) | ~~^~~~~~~~~~~~~~~ main.cpp:58:78: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 58 | if(q->children > 1 || (q->cnt && k != str.size()-1) || (q->children && k == str.size()-1)) | ~~^~~~~~~~~~~~~~~