Compilare: main.cpp: In function 'Trie* insert(Trie*&, 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(pos == s.size()) { | ~~~~^~~~~~~~~~~ main.cpp: In function 'void count(Trie*&, std::string)': main.cpp:60:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | for(int i = 0; i < s.size(); i++) { | ~~^~~~~~~~~~