Compilare: main.cpp: In function 'void add_cuvant(node*, std::string, int)': main.cpp:37:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | if(it == cuv.size()){ | ~~~^~~~~~~~~~~~~ main.cpp: In function 'void elim_cuvant(node*, std::string, int)': main.cpp:47:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | if(it == cuv.size()){ | ~~~^~~~~~~~~~~~~ main.cpp: In function 'int nr_ap(node*, std::string, int)': main.cpp:60:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | if(it == cuv.size()){ | ~~~^~~~~~~~~~~~~ main.cpp: In function 'int pref_max(node*, std::string, int)': main.cpp:66:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | if(it != cuv.size() && eu->nx[ cuv[it] - 'a' ] != NULL && eu->nx[ cuv[it] - 'a' ]->all > 0){ | ~~~^~~~~~~~~~~~~