Compilare: main.cpp: In function 'int main()': main.cpp:25:27: 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 = 1; i < a.size(); ++i) | ~~^~~~~~~~~~ main.cpp:31:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for (int j = i + 1; j < a.size(); ++j) | ~~^~~~~~~~~~ main.cpp:57:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | }while (respecta && i != b.size()); | ~~^~~~~~~~~~~