Compilare: main.cpp: In function 'void ins(nod*, std::string&, int)': main.cpp:17:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | if (poz == s.size()) { | ~~~~^~~~~~~~~~~ main.cpp: In function 'void del(nod*, std::string&, int)': main.cpp:36:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | if(poz == s.size()){ | ~~~~^~~~~~~~~~~ main.cpp: In function 'int queryCount(nod*, std::string&, int)': main.cpp:47:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | if(poz == s.size()) | ~~~~^~~~~~~~~~~ main.cpp: In function 'int queryPrefix(nod*, std::string&, int)': main.cpp:60:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | if(poz == s.size()) | ~~~~^~~~~~~~~~~