Compilare: main.cpp: In function 'void Insert(TrieNod*, std::string, int)': main.cpp:27:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for(int i = 0; i < c.size(); i++) { | ~~^~~~~~~~~~ main.cpp: In function 'void Delete(TrieNod*, std::string&, int)': main.cpp:45:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | if(idx == c.size()) return; | ~~~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:66:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | for(i = 0; i < s.size(); i++) { | ~~^~~~~~~~~~ main.cpp:73:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 73 | for(i = 0; i < s.size(); i++) { | ~~^~~~~~~~~~