Compilare: main.cpp: In function 'void add(Trie*, std::string)': main.cpp:25:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for (int i = 0; i < w.size(); i++) { | ~~^~~~~~~~~~ main.cpp: In function 'void erase(Trie*, std::string)': main.cpp:37:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | for (int i = 0; i < w.size(); i++) { | ~~^~~~~~~~~~ main.cpp: In function 'int count(Trie*, std::string)': main.cpp:46:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for (int i = 0; i < w.size(); i++) { | ~~^~~~~~~~~~ main.cpp: In function 'int lcp(Trie*, std::string)': main.cpp:57:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | for (int i = 0; i < w.size(); i++) { | ~~^~~~~~~~~~