Compilare: main.cpp: In function 'trie* insert(trie*, std::string, int, int)': main.cpp:12:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 12 | if( poz == s.size() ){ | ~~~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:73:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<trie*>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 73 | for( i = 0; i < v.size(); i++ ){ | ~~^~~~~~~~~~ main.cpp:78:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<trie*>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 78 | for( j = 1; ( 1 << j ) <= v.size(); j++ ){ | ~~~~~~~~~~~^~~~~~~~~~~ main.cpp:79:48: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<trie*>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 79 | for( i = 0; i + ( 1 << j ) - 1 < v.size(); i++ ){ | ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~