Compilare: main.cpp: In function 'void Add(node*, int)': main.cpp:261:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 261 | if(p == s.size()) | ~~^~~~~~~~~~~ main.cpp: In function 'void Del(node*, int)': main.cpp:274:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 274 | if(p == s.size()) | ~~^~~~~~~~~~~ main.cpp: In function 'int Cnt(node*, int)': main.cpp:284:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 284 | if(p == s.size())return nod -> end; | ~~^~~~~~~~~~~ main.cpp: In function 'int Pre(node*, int)': main.cpp:290:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 290 | if(p == s.size())return p * (nod -> cnt > 0); | ~~^~~~~~~~~~~