Compilare: main.cpp: In function 'long long int hashing1(std::string)': main.cpp:8:14: 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] 8 | for(i=0;i<s.length();i++){ | ~^~~~~~~~~~~ main.cpp: In function 'long long int hashing2(std::string)': main.cpp:19:14: 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] 19 | for(i=0;i<s.length();i++){ | ~^~~~~~~~~~~