Compilare: main.cpp: In function 'void insert(Trie*&, std::string, int, int)': main.cpp:20:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | if (pos == s.size()) { | ~~~~^~~~~~~~~~~ main.cpp: In function 'void erase(Trie*&, std::string, int)': main.cpp:40:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | if (pos == s.size()) { | ~~~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:73:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 73 | for (int j = 0; j < s.size(); j++) { | ~~^~~~~~~~~~ main.cpp:81:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | for (int j = 0; j < s.size(); j++) { | ~~^~~~~~~~~~