Compilare: main.cpp: In member function 'void Trie::add_word(vertex*, std::string&, int, int)': main.cpp:28:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | if (y == s.length()) | ~~^~~~~~~~~~~~~ main.cpp:31:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for (int i = 0; i < nod->letter.size(); i++) | ~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'void Trie::find_clean(vertex*, std::string&, int)': main.cpp:43:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | if (y == s.length()) | ~~^~~~~~~~~~~~~ main.cpp:46:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for (int i = 0; i < nod->letter.size(); i++) | ~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'void Trie::add_word_count(vertex*, std::string&, int)': main.cpp:55:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 55 | if (y == s.length()) | ~~^~~~~~~~~~~~~ main.cpp:58:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 58 | for (int i = 0; i < nod->letter.size(); i++) | ~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'void Trie::reset_tree(vertex*)': main.cpp:66:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<vertex*>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | for (int i = 0; i < nod->children.size(); i++) | ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'void Trie::find_difs(vertex*, std::string&, int, int&)': main.cpp:74:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<vertex*>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 74 | for (int i = 0; i < nod->children.size(); i++) | ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp: In member function 'void Trie::delete_all(vertex*)': main.cpp:86:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<vertex*>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 86 | for (int i = 0; i < nod->children.size(); i++) | ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:106:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 106 | for (int j = 0; j < s.length(); j++) | ~~^~~~~~~~~~~~ main.cpp:109:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 109 | for (int j = 0; j < s.length(); j++) | ~~^~~~~~~~~~~~ main.cpp:118:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 118 | for (int j = 0; j < s.length(); j++) | ~~^~~~~~~~~~~~