Compilare: main.cpp: In function 'int getcost(std::string, std::string)': main.cpp:40:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for(int i=1;i<a.size();i++) | ~^~~~~~~~~ main.cpp:43:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | for(int j=i;j<a.size();j++) | ~^~~~~~~~~