Compilare: main.cpp: In function 'void Insert(Trie*, const std::string&, int)': main.cpp:25:12: 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(idx == val.size()) { | ~~~~^~~~~~~~~~~~~ main.cpp: In function 'bool Delete(Trie*, const std::string&, int)': main.cpp:42:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | if(idx == val.size()) nod->fr--; | ~~~~^~~~~~~~~~~~~ main.cpp: In function 'int GetFr(Trie*, const std::string&, int)': main.cpp:59:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | if(idx == val.size()) return nod->fr; | ~~~~^~~~~~~~~~~~~ main.cpp: In function 'int GetLung(Trie*, const std::string&, int)': main.cpp:67:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 67 | if(idx == val.size()) return idx; | ~~~~^~~~~~~~~~~~~