Compilare: main.cpp: In function 'void add(trie*, int, std::string)': main.cpp:22:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | if(poz==s.size()) | ~~~^~~~~~~~~~ main.cpp: In function 'bool deletee(trie*, int, std::string)': main.cpp:37:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | if(poz==s.size()) | ~~~^~~~~~~~~~ main.cpp: In function 'int apar(trie*, int, std::string)': main.cpp:59:11: 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(poz==s.size()) | ~~~^~~~~~~~~~ main.cpp: In function 'int prefix(trie*, int, std::string)': main.cpp:69:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 69 | if(poz==s.size()) | ~~~^~~~~~~~~~