Compilare: main.cpp: In function 'void add(trie*, int)': main.cpp:19:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | if(poz>=s.size()) | ~~~^~~~~~~~~~ main.cpp: In function 'bool eliminate(trie*, int)': main.cpp:38:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | if(poz==s.size()) | ~~~^~~~~~~~~~ main.cpp: In function 'int number(trie*, int)': main.cpp:56:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | if(poz==s.size()) | ~~~^~~~~~~~~~ main.cpp: In function 'int prefix(trie*, int)': 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()) | ~~~^~~~~~~~~~