Compilare: main.cpp: In function 'int main()': main.cpp:22:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for(int k=2; k<B.size(); k++) | ~^~~~~~~~~ main.cpp:24:31: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 24 | for(int i=2; i<strlen(A); i++) | ~^~~~~~~~~~