Compilare: main.cpp: In function 'void Add(std::string)': main.cpp:20:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for(int i=0; i<s.size(); i++) | ~^~~~~~~~~ main.cpp: In function 'void sterge(std::string)': main.cpp:35:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for(int i=0; i<s.size(); i++) | ~^~~~~~~~~ main.cpp: In function 'int numaracuv(std::string)': main.cpp:47:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | for(int i=0; i<s.size(); i++) | ~^~~~~~~~~ main.cpp: In function 'int prefix(std::string)': main.cpp:60:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | for(int i=0; i<s.size(); i++) | ~^~~~~~~~~