Compilare: main.cpp: In function 'void compute_hash()': main.cpp:28:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | for(int i=1;i<=a.size();i++) | ~^~~~~~~~~~ main.cpp:31:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for(int i=1;i<=b.size();i++) | ~^~~~~~~~~~