Compilare: main.cpp: In function 'Node* insertWord(Node*&, std::string&, int)': main.cpp:25:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | if(p == s.size()) | ~~^~~~~~~~~~~ main.cpp: In function 'Node* eraseWord(Node*&, std::string&, int)': main.cpp:37:10: 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(p == s.size()) | ~~^~~~~~~~~~~ main.cpp: In function 'int findWord(Node*, std::string&, int)': main.cpp:57:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | if(p == s.size()) | ~~^~~~~~~~~~~ main.cpp: In function 'int findPrefix(Node*, std::string&, int)': main.cpp:65:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 65 | if(p == s.size() || node->letters[s[p] - 'a'] == NULL) | ~~^~~~~~~~~~~ main.cpp: In function 'int findWord(Node*, std::string&, int)': main.cpp:60:13: warning: control reaches end of non-void function [-Wreturn-type] 60 | findWord(node->letters[s[p] - 'a'], s, p + 1); | ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int findPrefix(Node*, std::string&, int)': main.cpp:70:15: warning: control reaches end of non-void function [-Wreturn-type] 70 | findPrefix(node->letters[s[p] - 'a'], s, p + 1); | ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~