Compilare: main.cpp: In function 'void Add(Nod*, int)': main.cpp:34:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | if (poz == s.size()) | ~~~~^~~~~~~~~~~ main.cpp: In function 'bool Del(Nod*, int)': main.cpp:52:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | if (poz == s.size()) | ~~~~^~~~~~~~~~~ main.cpp: In function 'int Count(Nod*, int)': main.cpp:75:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 75 | if (poz == s.size()) | ~~~~^~~~~~~~~~~ main.cpp: In function 'int Prefix(Nod*, int)': main.cpp:88:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 88 | if (poz == s.size()) | ~~~~^~~~~~~~~~~