Compilare: main.cpp: In function 'void insertTrie(trieNode*&, std::string)': main.cpp:13:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for (int index = 0; index < word.size(); ++index) { | ~~~~~~^~~~~~~~~~~~~ main.cpp: In function 'void deleteTrie(trieNode*&, std::string, int)': main.cpp:26:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | if (index == word.size()) { | ~~~~~~^~~~~~~~~~~~~~ main.cpp: In function 'int frqTrie(trieNode*&, std::string)': main.cpp:40:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for (int index = 0; index < word.size(); ++index) { | ~~~~~~^~~~~~~~~~~~~ main.cpp: In function 'int prefix(trieNode*&, std::string)': main.cpp:52:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for (index = 0; index < word.size(); ++index) { | ~~~~~~^~~~~~~~~~~~~