Compilare: main.cpp: In member function 'std::string Trie::get()': main.cpp:52:35: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare] 52 | if(ans.size() == k - 1) | ~~~~~~~~~~~^~~~~~~~ main.cpp: In function 'int main()': main.cpp:77:26: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'll' {aka 'long long int'} [-Wsign-compare] 77 | while(ans.size() < k) | ~~~~~~~~~~~^~~ main.cpp:65:18: warning: 'out' may be used uninitialized in this function [-Wmaybe-uninitialized] 65 | node = node->fii[out]; | ~~~~~^~~~~~~~~~~~~~~~ main.cpp:48:17: note: 'out' was declared here 48 | int out; | ^~~