Compilare: main.cpp: In member function 'void Nod::add(int)': main.cpp:13:7: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | if(poz==s.size()-1)v[ch]->cuv++; | ~~~^~~~~~~~~~~~ main.cpp: In member function 'void Nod::delt(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()-1){ | ~~~^~~~~~~~~~~~ main.cpp: In member function 'void Nod::cnt(int)': main.cpp:30:11: 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()-1){ | ~~~^~~~~~~~~~~~ main.cpp: In member function 'int Nod::comun(int)': main.cpp:40:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | if(poz==s.size()-1)return 1; | ~~~^~~~~~~~~~~~