Compilare: main.cpp: In member function 'void Trie::insert(std::string)': main.cpp:55:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 55 | for (int i = 0; i < word.size(); i++) { | ~~^~~~~~~~~~~~~ In member function 'void Trie::remove(std::string)', inlined from 'int main()' at main.cpp:130:25: main.cpp:86:16: warning: 'void operator delete(void*, std::size_t)' called on pointer returned from a mismatched allocation function [-Wmismatched-new-delete] 86 | delete c_word; | ^~~~~~ main.cpp:83:48: note: returned from 'void* operator new [](std::size_t)' 83 | char *c_word = new char[word.size() + 1]; | ^