Compilare: main.cpp: In member function 'void Trie::adauga(const std::string&, int, int)': main.cpp:32:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | if (index >= s.size()) | ~~~~~~^~~~~~~~~~~ main.cpp: In member function 'int Trie::solutie(const std::string&, int&, int, int)': main.cpp:50:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | if (index >= s.size()) | ~~~~~~^~~~~~~~~~~ main.cpp: In function 'std::string toString(int)': main.cpp:98:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 98 | for (int i = 0; i < sol.size() / 2; i++) | ~~^~~~~~~~~~~~~~~~