Compilare: main.cpp: In function 'void add_trie(trie*, int, int)': main.cpp:30:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | if (poz == s.size())return; | ~~~~^~~~~~~~~~~ main.cpp: In function 'void delete_trie(trie*, int)': main.cpp:43:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | if (poz == s.size())return; | ~~~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:65:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 65 | for (int j = 0; j < s.size(); ++j) | ~~^~~~~~~~~~ main.cpp:72:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | for (int j = 0; j < s.size(); ++j) | ~~^~~~~~~~~~