Compilare: main.cpp: In function 'bool subsir(std::string, std::string)': main.cpp:25:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for (int i=0; i<y.length(); i++) | ~^~~~~~~~~~~ main.cpp:36:14: 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 (j==x.length()) | ~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:53:30: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 53 | if (m[i].length()==maxx) | ~~~~~~~~~~~~~^~~~~~ main.cpp:60:35: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 60 | else if (m[i].length()>maxx) | ~~~~~~~~~~~~~^~~~~