Compilare: main.cpp: In function 'void add(Trie*&, std::string, int)': main.cpp:16:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | if (ind == s.size()) { | ~~~~^~~~~~~~~~~ main.cpp: In function 'void remove(Trie*&, std::string, int)': main.cpp:31:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | if (ind == s.size()) { | ~~~~^~~~~~~~~~~ main.cpp: In function 'int get(Trie*&, std::string, int)': main.cpp:44:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | if (ind == s.size()) { | ~~~~^~~~~~~~~~~ main.cpp: In function 'int prefmx(Trie*&, std::string, int)': main.cpp:60:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | if (ind == s.size()) { | ~~~~^~~~~~~~~~~