Compilare: main.cpp: In function 'void add_cuvant(node*, std::string, int)': main.cpp:32:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | if(it == cuv.size()){ | ~~~^~~~~~~~~~~~~ main.cpp: In function 'bool elim_cuvant(node*, std::string, int)': main.cpp:46:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | if(it == cuv.size()){ | ~~~^~~~~~~~~~~~~ main.cpp: In function 'int nr_ap(node*, std::string, int)': main.cpp:75:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 75 | if(it == cuv.size()){ | ~~~^~~~~~~~~~~~~ main.cpp: In function 'int pref_max(node*, std::string, int)': main.cpp:87:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 87 | if(it < cuv.size() && eu->nx[ cuv[it] - 'a' ] != NULL){ | ~~~^~~~~~~~~~~~