Compilare: main.cpp: In member function 'void Trie::adauga(std::string&, int, int)': main.cpp:39:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | if (index >= s.size()) | ~~~~~~^~~~~~~~~~~ main.cpp: In member function 'void Trie::elimina(std::string&, int)': main.cpp:60:19: 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 (index < s.size() && this->fiu[s[index] - 'a'] != nullptr) | ~~~~~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:113:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 113 | for (int index = 0; index < s.size(); index++) | ~~~~~~^~~~~~~~~~ main.cpp:124:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 124 | for (int index = 0; index < s.size(); index++) | ~~~~~~^~~~~~~~~~